You can't be friends with the devil. Tolerance for what they see as wrong is evil, too. But tolerance is essential to the warp and weave of a pluralistic society. Without tolerance to those who differ from you, the social fabric begins to tear. Rips cleave deep.
Blood runs in the streets.
Without tolerance to ideas you despise, there can be no dialogue. Yes, honor the yearning and search for eternal truths. Honor those who seek some center where such truth may reside.