A friend keeps saying that we have to keep preaching in the hope of helping others have salvation, all the apostles died preaching and so we must follow their path, without fear.
He has a point, and many biblical verses back it up, but in a modern society we respect other beliefs. Not doing so have many bad consequences.
My friend argues that if the apostles respected other beliefs, they wouldn't have been killed and Christianity wouldn't have spread. He says to aggressively preach of Jesus trying to convince them to follow him. Not doing so is a sin. He argues that people are shy or ashamed of such thing.
Is it a sin not to preach according to Catholic Church? Is it something to repent? Is it practical to preach in today's world? One could argue that it was never practical otherwise no one would have died because of it but still.
Is it feasible without hurting anyone's feeling? My friend argues that people feelings doesn't matter since their souls are on the line.
For example, I have a Muslim friend, very close one, should I try to convince him aggressively to switch religions even if that would most probably destroy our relationship?