And saying they're banning anything is, itself, a touchy subject, which could impact ad-revenue adversely. Hence, they need to silently remove anything objectionable while pretending they're not. In fact, in general, this sees to be one of the very few issues were the extreme right and left are each others opposite. Since the extreme left claims their authority by talking for everyone, they have to keep up the appearance that there is no dissent. The extreme right bases their rule on the pretense of being better than everyone else, so they don't have to hide their opposition. In fact, they might gain something from finding ever new enemies to fight, so they can keep demonstrating their superiority.