You’re collapsing progressives and leftists and just making my policy positions up in your head because otherwise your point falls apart.
A progressive Democrat winning a red seat inside the party (as in working with and within the party like Rehmet did) is not proof that Democrats should “stop attacking the left.” It’s proof that better Democrats, even progressives in the party, can win and don't need to resort to attacking their own potential coalition partners in the rest of the party.
Also, if you have to rewrite my position as “I support genocide and hate everything that tries to upend the status quo” to answer me, you’re not rebutting me. You’re constructing a straw man.