There is no WHY about the gods. They have their duties, and that's that.
Zeus
Zeus is not typically referred to as a bastard in mythology. He is often portrayed as the king of the gods and the father of many other gods and mortals. However, the exact parentage of Zeus can vary depending on the mythological tradition or story being told.
no, several were mortals
Gods (any) do not justify their decisions to mortals.
There are plenty of mortals that Zeus killed, but he did not kill any gods or goddesses.
Since Zeus is the father of the gods and Zeus's father is Kronus the King of the father of the gods is Kronus.
Because he was born first from chaos his mom so he is the king by birth because no one else could do it because Zeus took away a the second generation children which were titans because they were evil. Then the others came but that is another story about the other gods.
Zeus is the father of Kratos and so is the olympus the god of sun. he has supreme authority over mankind and all living beings over earth and hence he is in close relationship with the mortals
It was only for the gods
Yes they did. How do you suppose demi-Gods such as Hercules or Perseus came about? Not only did they communicate with mortals, but they had sexual relations with them. Zeus, father of Hercules and Perseus consorted with their mortal mothers making the two hero's demi-Gods. Meaning half God, half human. Many of the Greek Gods took on multiple lovers, several where mortal.
Hermes was the messenger of the gods in Greek mythology. He was known for his speed and cunning, often delivering messages between the gods and mortals.
Zeus, the king of the gods in Greek mythology, liked being worshipped and respected by mortals, as well as maintaining order in the world. He disliked being defied or challenged by other gods or mortals, especially when it threatened his authority or power.