Because to be christian you didn't have to pay anything, Christianity promised afterlife and god would forgive every mistake, To converte you could had been from any social classes.
Political expediency - The Roman Emperor Constantine won the war and all the new territory he was going to govern had a large Christian population. The Christians also incorporated some of the Romans idolatry ways of worshiping their many gods into Christianity to make it appealing to the Romans.
Christianity is a very appealing religion, particularly by people who have no standing in society. Christianity stresses that death may not be the end, that the riches, powers, and glory of this world are unimportant (thus the appeal to the powerless), that God loves all people, and that love of other people is the key to salvation. Therefore, many Romans abandoned the Roman gods and converted to Christianity.
the Romans brought Christianity to England in in the great invasion of 55 AD.
No, Christianity wasn't invented by Romans. It was sent to Jesus by God and Jeasus spread Christianity.
No Romans existed way before Christianity
Christianity
Christianity maybe?
NO
The Greeks and Romans have many gods (polytheism) but Christianity only has one God (monotheism).
The appeal of Christianity for many was it's promise of a joyous afterlife if one behaved according to Christian teachings. Now there were other sects that also promised an afterlife, but Christianity was the most aggressive in its quest for converts.
They aren't.
The Romans believed in many Gods - not just one. They saw the teachings of Christianity as a threat to their beliefs, and tried to suppress its followers.