I think this response is a bit harsh. I can understand where they are coming from, and once upon a time i myself may have had a similar kneejerk reaction. I think that as i matured (politically, though age also helps to put things into perspective) i came to understand that such an emotional reaction was not productive. Criticize what needs to be criticized and learn as much as you can from any source that you can. As Lenin said the most important thing a young revolutionary can do is учиться, учиться и учиться.

I think what the OP of this comment chain needs to ask themselves is this: there are already enough imperialist shills trying to discredit and smear anti-imperialist voices, regardless whether these voices come from the left or the right (and frequently conflating the two anyway); do i really want to help them do that and what does my revolutionary cause gain by doing so?

The problem with saying "X is right wing therefore anything they have to say is automatically suspect and we should not listen to them" is not just that it's superficial moralism, it's that by doing so you also discredit any correct analysis they may have. Then later when communists make the same correct arguments and point out the same factually true things, our own analysis will have already been discredited by association with the objectionable source. According to the "guilt by association" precedent that we ourselves would have already set.

This is obviously a self-defeating strategy for communists which allows the liberal imperialists to successfully smear the anti-imperialist position as a whole as a right wing one. The correct approach is to critically analyze the content of an argument and judge it based on its merits rather than who it came from.