I do not disagree with your analysis, but I do want to add a comment about the “credibility” point. In the US, I think the issue of undocumented persons is the most important issue strategically for a communist org or leftists in general to embrace. People understandably bemoan the lack of leftist support in the US. But they are also are looking at the lives of the top say 50-60% of the population. Also understandable - all of society is structured to make it seem like the middle class and wealthier is where like 95% of the population resides socioeconomically, and precarity and poverty are something only a small minority experience.

I believe there is tremendous revolutionary potential in the US, but the core of the that energy isn’t with people like myself - middle class white folks with an office job (obligatory “read Settlers”). It’s with the groups that experience super-exploitation and oppression: undocumented workers, African-Americans, LGBTQ folks, Muslim immigrants, etc. By standing in solidarity with undocumented persons, the PSL is right where it should be in terms of building trust and relationships in the communities with the most revolutionary potential.

Of course both things could be true - this could be bad for recruitment for them and also useful for their reputation.