Denial of the mere existence of a countervailing argument is a common feature of the Left these days. The idea is that by pretending opposition to bizarre ideas doesn’t exist, you can mainstream those bizarre ideas. Thus, “everyone believes” that climate change is not merely a byproduct of human activity, but that it threatens life on earth; to deny the latter proposition is tantamount to Holocaust denial. “Everyone believes” that America is systemically racist; to do otherwise is to mark yourself as a bigot.