well there were battles between them and rome. but rome did not do it all at once. but essentially there, was not much difference in their polytheism. but rome did destroy their history, and replace it with theirs in colonialism. it is why we, do not know all that much about etruscans. just like when islam, hitler, stalin, destroyed ancient records in colonialism. with intentions of replacing history, with their version. typical, history is destroyed and rewritten non-objectively by the victor.