Not all anarchist critique of communism is anarchist by virtue of coming from self-described anarchists. Some is liberal, and the barrier to entry for genuine anarchist critique of existing and formerly existing socialist states is higher than just repeating red scare era misinformation. Further, some anarchist critique is genuinely anarchist critique, but based on misinformation from liberals and fascists, and so still needs to be corrected even if we accepted the nature of the critique.

The reverse is also true for Marxists critiqueing anarchists, of course, but there just isn’t the same level of scale when it comes to existing anarchist projects, so the level of anti-anarchist fearmongering from liberals and fascists isn’t nearly as high. Regardless of your opinions on anarchism, this is a basic fact that must be accepted.

The pursuit of genuine truth for genuine critique is something anarchists and Marxists should agree on, especially when we both should agree that it’s the fascists and liberals that are our primary enemies, not each other. Anarchists and Marxists have worked together on numerous occasions, it’s the rare times that we’ve raised arms against each other that get remembered to sow division.