Tolerance is "the ability or willingness to accept something, in particular the existence of opinions or behavior with which one does not necessarily agree." Tolerance is an essential characteristic of pluralistic democracy and a necessity for peaceful co-existence of different peoples. Otherwise, we have varying forms of tribalism which each espouses that anyone not part of my tribe is not human and does not deserve to live. Tolerance doesn't require understanding, approval or love only acceptance of the right to exist. Can't we offer that to each other?
If you say that the only people who should live are Christians or whites or the wealthy or Americans or heterosexuals, you prescribe to tribalism. Tribalism was perhaps needed thousands of years ago but in this planetary, interconnected age it does not work and is a grave danger to world peace, sustainability and justice.
The profound question that gets raised is what is a human being and why on Earth are we here? Are we intelligent animals, consumers of production, citizens of the state, children of God, compassionate wise beings, a star's way of looking at a star, consciousness of consciousness of consciousness, or are we something else? Take utmost care; for from your truthful answer flow all your actions toward all people everywhere and in fact determine what kind of human being you are.