[matchu]

Sam's argument seems to be that one of our major social problems is that we socially disallow controversial ideas, which makes him feel uncomfortable expressing himself and stifles social progress. Therefore, we should start allowing controversial ideas.

The parent comment asserts that Sam's premise is wrong: ideas aren't being rejected for their controversy, but rather for their harmfulness. Saying that "it’s possible we have to allow people to say disparaging things about gay people" (see his previous post) implicitly draws a false equivalence between civil rights advocacy and bigotry as fair-game "controversial" ideas.