I am perhaps confused about what your claim is. Do you mean to say “Chloe Cockburn does not have expertise except in the facts of the law and being a left-wing anti-Trump activist”? Or “Chloe Cockburn has a good deal of expertise in fields relevant to the best possible way to reduce mass incarceration, but her opinion is sadly biased because she has liberal political opinions”?
Regarding her Twitter, I think Chloe Cockburn might have an informed opinion that reducing deportations of undocumented immigrants would reduce incarceration (through reducing the number of people in ICE detention) while maintaining public safety. That would cause her both to recommend Cosecha and to advocate on her Twitter feed for reducing deportations. Indeed, it is very common for people to do awareness-raising on Twitter for causes they believe are highly effective: if your argument were taken to its endpoint, we ought not trust GiveWell because its employees sometimes talk about how great malaria nets and deworming are on social media.
Probably, like all people, Chloe Cockburn supports the causes she supports for both rational and irrational reasons. That is something to take into account when deciding how seriously to take her advice. But that is also a fully general counterargument against ever taking advice from anyone.
I am confused. If you took it as given, why bother talking about whether Alliance for Safety and Justice and Cosecha are good charities? It surely doesn’t matter if someone is good at doing something that you think they shouldn’t be doing in the first place. Perhaps you intended to say that you mean to discuss the object-level issue of whether these charities are good and leave aside the meta-level issue of whether EA should be involved in politics, in which case I am puzzled about why you brought up the meta-level issue in your post.
I disagree that animal welfare activism hasn’t been subsumed into the culture war. For instance, veganism is a much more central trait of the prototypical hippie than immigration opinions are. PETA is significantly more controversial than any equally prominent immigration charity.
I think that wild-animal suffering and synthetic meat are mostly not part of the culture war because they are obscure. I expect that they would become culture-war issues as soon as they become more prominent. Do you disagree? Or do you think that the appropriate role of EA is to elevate issues into culture-war prominence and then step aside? Or something else?
Do you mean that EA shouldn’t take sides in e.g. deworming, because that’s a tribal war between economists and epidemiologists? Or do you mean that they shouldn’t take sides in issues associated with the American left and right, even if they sincerely believe that one of those issues is the best way to improve the world? Or something else?