Your other points aside, which one does not have to agree with every action of law enforcement to support (immigration) laws and their enforcement...
The question is about whether Jesus/God would consider closed borders and strict immigration laws and their enforcement to be moral.
Can you tell me what immigration laws Jesus/God described for His eternal kingdom?
And for the record, from the Christian perspective, scripture was given for us to conform to, not to conform it to make it more palatable. God revealed Himself for us to conform to, not for us to remake Him into something else, in the hopes that people who would otherwise reject Him will reconsider. He's not here to pass your test. You are perfectly free to go about your business, reject Him, and find out for yourself how He feels about borders and immigration enforcement. (And for the record, I have a feeling that if you dig deeper into the fullness of scripture, you'll find far more about the God of the Bible to offend you. Immigration laws would be a drop in the bucket.)
My genuine desire would be that you reconsider that decision/rejection.
(Edited to add that I don't consider it my or any Christian's duty to either defend or condemn vague, unproven accusations like we see in your post. If you want to post specific, proven ICE agent abuses, I'm sure that most Christians would condemn any law enforcement abusing their positions. But they'd probably also realize that Romans says that God established government as a wielder of the sword to put fear into hearts and deal with lawlessness. So, each accusation would likely need to be a discussion on its own merit and details.)