individual [GOP] members of Congress are on a spectrum and can be influenced to vote in our best interests.

If you truly believe that, I have a mountain chalet in Florida to sell you.

Name one time since 2016 that anything good came from negotiating with the GOP on immigration. Hell, name one time in this MILLENNIUM.

there are almost always some members that aren’t voting along their party lines

Anything even resembling change for the better on immigration being amongst the exceptions that makes your "almost" necessary.

Just look at how democrats won concessions from the house on the spending bill

Spending is not the same thing as immigration. While fascists don't like social programs that benefit those who need help, they don't have an automatic visceral fear and hatred of them like they do with immigrants.

made republicans look stupid in the process.

As an aside, they were already doing that themselves

Your approach would’ve resulted in a government shutdown instead.

No. The Republicans hold the federal government hostage every time raising the debt ceiling comes up. It's as much part of what they do as demagougery in general is.

Letting them persecute and otherwise abuse immigrants more or less doesn't change that. It just lets them persecute and otherwise abuse immigrants more.