The Bible actually considers guilt a cheap alternative to real regret and change. If you're walking down the street and discover you have a hole in your pocket, don't stand around feeling guilty. Transfer any remaining coins to the other pocket, and then go on. When you get home, sew up the pocket. Regret and change are useful.
Guilt is pointless and destructive.
Tolerance means assuming the people you disagree with are honest and well meaning. It doesn't mean all opinions have equal merit or that no one is right. It is also crucial to distinguish between loving people and loving all their actions or beliefs. Rabbi Aryeh Levin lived in Israel during the British Mandate. One Shabbat, he was walking in the streets of Jerusalem when a secular Israeli came toward him, smoking a cigarette.