Who's mistreating illegal immigrants? Who's mistreating legal immigrants? Where is all of this mistreatment happening?
If the people you claim to stand up for don't exist then you might as well just sit back down.
The mistreatment of people is a very common cause the left uses all the time. The problem is they are standing on a non-existent platform. No one is being systematically mistreated in this country.
Marxists must find oppression wherever they can. If they can't find it they make it up. This has been happening for decades.
Get back to us when you find real and actual oppression.