Aztecs

The conquistador Hernán Cortés (aka Hernando Cortez 1485-1547) conquered the Aztec empire in 1519 (and again in 1521) , and the tribes were subsequently decimated by European diseases such as smallpox.

The Aztec sacrifice for gift to gods. they believed that god destroyed Earth 3 times and if it happened again the gods would destroy earth forever. They also thought that the mayans were big dickheads and were punished for prostitution.

Emperor Montezuma

Immigration, immigration and immigration.

Both the Aztec and the Anasazi peoples anticipated the changing of the seasons by tracking the passage of the planets and the stars. They focused their ceremonies on the broad concepts of harmony and balance in nature, and they believed that their ceremonies, properly done, would be rewarded by rain, abundant harvests, successful hunts and good health. They both held beliefs with common threads about their origins and deities. They used similar cultural icons as ritualistic symbols, which seem to have sprung from common cultural wellheads. For instance, their step-sided rain cloud altars and their ceremonial masks probably had roots in the great civilizations of southern Mexico.

The Aztecs had a huge pantheon, of over 100 deities. Some of the these gods were more powerful and better known than other though, such as Quetzalcoatl, Huitzilopochtli, Chalchiutlicue, Xipe Totec, Tlaloc, and Tezcatlipoca.

It's just Catholic, not Roman Catholic. Roman is an epithet first commonly used in England after the protestant revolt to describe the Catholic Church. It is never used by the official Catholic Church.

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Both religions are based on human blood sacrifice, although in the case of the Catholic religion, those sacrifices were prefigured in animal sacrifice and completed in the self-sacrifice of the God-man, Jesus Christ, on the cross. Every re-presentation of that sacrifice is offered on the altar in an unbloody manner under the forms of bread and wine. The Aztec sacrificed just about anyone, and rivers of blood flowed as they sacrificed their enemies, their children, etc.

Tenochtitlán was built on an island in the middle of Lake Texcoco

It was already crashing (suddenly dying off) from 40-60 million in 1521 to less than 12 million by 1550.

The Aztecs view death as another phase of life

The Aztec priests were so powerful because they were the only ones who could make offerings (or sacrifices) to the Gods. It was believed that the priests had contact with the Gods and knew what they wanted, therefore the Aztec people revered their priests and did what they were told to do by them.

Hernan Cortes or some other spanish explorer dude.

Before Tenochtitlan was founded, the Aztecs were a nomadic people whose religion stated that whenever they saw a golden eagle, perched atop a cactus and devouring a snake, they had to settle and build a 'great city'. They found such sign in a swampy, small island in Lake Texcoco. This prophecy was immortalized in the Mexican coat of arms.

Now, not deterred by the unfavourable terrain, they set about building their city, using the chinampa system (misnamed as "floating gardens") for agriculture and to dry and expand the island. Basically, such system requires building levees and then filling the reclaimed land with soil. Such system was also implemented - faster and with better technology, of course - by the Dutch people to reclaim land from the sea.
The wandering "Aztec" tribe saw a vision of an eagle on a cactus, and this was foretold to them that this sign would signal the place where they should settle and build their city on a "promised land".

No, the Maya were separate city states, and Aztecs had their capital at Tenochtitlan but the Mayas were sometimes under a empire ruled by one of their city states but Tenochtitlan was never their capital.

they thought that sarificing would give them sun and rain

My spouse was 17, thrown in by his mother, after seeing what he saw in Vietnam to his brothers, he asked when he was 18 to go into action. He could not sit by and watch as his brothers gave their lives. How it's affecting him now, that's a different story. PTSD, Agent Orange Exposure and more. The worst thing I ever did, I thought I was helping was take him to the wall. That is not for those who were there. It's for families and/or tourism. Worst thing I ever did to him. Although at the time, he did not realize it would affect him, or he would not have gone.

The Aztecs thought that Cortés was a god-king, mistaken for Quetzalcoatl the light skinned, bearded God-King of the Aztecs - the 'Winged God - Feather Serpent 'so they treated him and his soldiers well.

Soon Cortés thought the Aztecs and Montezuma would find out he was not a god, so he held Montezuma hostage and threatened to kill him if he did not do what he wished, though there are many different theories the way Montezuma died, the most popular one is that Montezuma was forced to anger his people or Cortés would kill him himself

The population of the Aztecs was about 200,000 people

The Aztecs came to Mexico during the 13th Century. Which is about 700 years ago :)

Legend has it, that the Aztecs found the place for their new City in a spot where they saw an eagle perched on a cactus eating a snake. Once their city was complete, They called it Tenochtitlan, meaning "Place of the Prickly Pear Cactus".

They renovated the city to a grid-like pattern. Canals separated it into 5 sectors, which accommodated the huge population.

Cortes was a brilliant military leader. He understood the value of building relationships and alliances with the surrounding tribes. What we would now call military Intelligence, he used to his advantage. The Aztecs like most of the Pre-Colombian Indians were fierce warriors. If not for good fortune and proper preparation of the Battle field. Cortes would not have had a chance. Had all the tribes combined forces, they would have beat the Spanish on the Beaches. Mexico and central America would not be as we know it today.

Aztec religion did not have a hierarchy of sorts for its gods, as did some European pantheons. However, Huitzilopochtli is considered the patron god of Aztecs and was as such accorded a high status in the holy cities.

The Athenians worshipped allofthe Greek gods, just likethe rest of Greece, but Athena was their patron goddess.

Throughout history, human sacrifice has been carried out, exclusively by other humans.

Although most people equate human sacrifice with ancient obscure religious cults and barbaric cultures, it continues to this day and in some very public places.

We tend to think of painted savages wielding stone blades when we think of human sacrifice, but government officials, religious zealots and the commanders of military actions are, as I type this, practicing human sacrifice. And the unnerving thing about it is that most of those sacrificed go willingly to the slaughter, believing they are "doing the right thing".