All the world is not a slippery slope and I have neither need nor desire to give in to the dishonest and disruptive behvior of a few extremists.
Thus everything jumps to the excluded middle argument, the third most popular logical fallacy of the Internet (behind that ad hominem attack and the straw man). And the danger of refusing to deal with moderation is that you can wind up looking like and extremist, yourself, and in a battle between extremists, there is no guarantee that your side will win.