They quote the phrase “I am my sister's keeper. I am my brother's keeper”, but do not understand or willfully misinterpret the meaning. Note the use of the singular, “I”. There is no way to cast this other than, that, I, as an individual, am responsible for my brother or sister. Jesus in no way advocated for inforced charity at the point of a gun, which is what tax and redistribute is.
Cain’s question to God, “What am I, my brother’s keeper?” was sarcasm. Cain was saying in modern English “How would I know?”
I am not Catholic, so I am ignorant of Catholic tradition, but Cain’s question is in no way a command that we become our brother’s keeper. In the following verses God curses Cain but doesn’t tell him is to become his brother’s keeper.
What the Biblical Jesus had to say about caring for others bears almost no resemblence to the Jesus I hear about from political activists.
--was a sarcastic response, and
--was not answered in the affirmative my the Almighty.
Abel didn't need his brother to be his keeper.
He didn't need Cain to be his murderer, either, and that's the whole point.
By the way, anyone who sets up to be my keeper is going to be in for a certain degree of resistance right off the bat, which will only escalate.