what are the oppressed? Advocates for incrementalism?
A lot are, there's no way around this. There isn't any mass revolutionary movement in the U.S., and there really aren't even regional ones. At best you have a decent PSL chapter that's probably dwarfed by your local DSA. Incrementalism is the only game in town at the moment, so a lot of people support it because there isn't anything better.
The argument against incrementalism is that it doesn't work. If an incremental improvement is your goal from the start you'll get only scraps and they'll always be subject to being rolled back -- look at abortion, look at wage gains, look at the halting steps to check the imperial machine. It's not privileged to recognize when someone is trying to buy you off with scraps, and being oppressed does not magically grant anyone political acumen.