The issue many of those constituents have is what has been the de facto US policy for many many years, across many different political parties has largely been the same. In recent history, I will say the general thought is that the GOP has been more pro-Israel, but in reality, the DNC has been pretty pro-Israel as well. There is certainly much more lip service towards the Palestinians from the DNC, but what policies can you point to that shows there is a difference between the two parties in the last 30 years, minus the last 5 months.
Meanwhile, Trump was out there saying he is anti-war, regardless of which war. That was appealing to the many in Dearborn area. As you may be aware, I don't hold Trump to any high esteem but even I was surprised that his solution would be to let Israel clear out all Palestinians and build hotels on the coast. But even with that, it's not like Tlaib endorsed Trump, she just simply refused to endorse Harris.