Not just Democrats.
It’s all about cementing the George HW Bush Plan for North Mexico (aka USA) in place.
They desperately do not want US to be able to restore the rule of law and reverse the demographic changes they have instituted through non-enforcement of laws and borders.
They invited 30 million people here to change the country against the will of the citizens and they do not want US sending them home.
The final amnesty that would cement the Bush Plan for North Mexico (aka USA) into place has been sought repeatedly since 2006. They sold us Rubio to get the last one in 2013.
We have been prevented from electing anyone who would side with US and the rule of law by their control of the RNC and state parties.
The most important thing to the Uniparty is protecting the demographic changes they have made to the country against the will of the citizens.
That’s what drives the NeverTrump, the media and the Democrats hatred of Trump, it is an extension of their hatred of US.
I would guess that at least 60% of Republicans have exactly the same views on immigration as most Democrats. Paul Ryan is probably closer to Nancy Pelosi on the issue than he is to Trump (and even the President seems to be much too willing to compromise on the issue).