Tolerance is not a Christian virtue.

This. A thousand times, this:

"We need to remember that tolerance is not a Christian virtue. Charity, justice, mercy, prudence, honesty -- these are Christian virtues. And obviously, in a diverse community, tolerance is an important working principle. But it's never an end itself. In fact, tolerating grave evil within a society is itself a form of serious evil. Likewise, democratic pluralism does not mean that Catholics should be quiet in public about serious moral issues because of some misguided sense of good manners. A healthy democracy requires vigorous moral debate to survive."

From an address given by Archbishop Chaput of Philadelphia, ca. August 2012.