Ok, I guess that priest decided to give you an answer to get you out of the way and then you accepted it, but that's something for you to study and find out how comes there were more humans when Cain went his way.
Your big question "if Jesus was considered to be King of the Jews, why are there Catholics?"
Well, Jews didn't accept Jesus as their King, Jesus Kingdom is not earthly and catholics are religious followers while Jesus didn't create a religion.
Ok, I guess that priest decided to give you an answer to get you out of the way and then you accepted it, but that's something for you to study and find out how comes there were more humans when Cain went his way.
Your big question "if Jesus was considered to be King of the Jews, why are there Catholics?"
Well, Jews didn't accept Jesus as their King, Jesus Kingdom is not earthly and catholics are religious followers while Jesus didn't create a religion.