He spoke to a Catholic audience thus the reference to Catholics, but the principle applies to all Christians particularly his conclusion that “a healthy democracy requires vigorous moral debate to survive.”
Source: Dover Beach
Archbishop Chaput of Philadelphia said in the last year that evil preaches tolerance until it is dominant and then it tries to silence good…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.