FRSO seems good on most things, but supports "upholding past treaties" with native Americans, which is somewhat of a red flag. PSL seems good but I've heard claims that they're not that good on the settler colonial issue either and lack proper democratic centralist structure. I don't know much about the WWP, but their 15 point programm doesn't mention landback at all. I know next to nothing about the other socialist parties/orgs on the US, so I can't give my opinion on them
I think you're a bit confused about FRSO's line. It's extensively documented here: https://frso.org/main-documents/immediate-demands-for-u-s-colonies-indigenous-peoples-and-oppressed-nationalities/
We support the full sovereignty of all oppressed nations within the US
I recently wrote up my thoughts on FRSO as an org, if anyone is curious, here
Like most things with FRSO, this is extremely close to the PSL position:
FRSO also views the US as having internal countries being (imperialised? Sorry my phrasing is bad,) the Black Belt south and Aztlán, which they advocate self determination for
Advocate self-determination for, not separatism.
Thank you
Yes, but self-determination can encompass political autonomy