Richard Cohen's article titled "The Bigotry of Trump and Farrakhan" is well written, made good points on bigotry and why silence is complicity. Here is an excerpt from this Washington Post article:
"More troubling are the people who think they can parse their messages, accept what they like and discard the rest. This is possible with ordinary public figures or politicians. You can, say, endorse their foreign policy but not their position on ethanol. But when the salient piece is a call for intolerance — sometimes stated, sometimes not — then the culprit is not just the speaker but also the listener as well. Silence is complicity......But I also believe that we all have an obligation to repudiate bigotry and not think we can use it to serve a political purpose. Many thousands failed to do that over the weekend on the Mall, and many more have done something similar by supporting Trump. For them, I have just one word: Shame."