Your second paragraph is implying that the half of Americans who voted for Trump are "bad Americans". That seems to be sowing the division that your first paragraph warns against (even if it is a reason to dislike Trump).
I don't think either democrats or republicans can claim the moral high ground about sowing division.
Can you show that the arrests are unlawful? Or else what exactly is your basis for the use of the term "kidnapping"?
https://fox4kc.com/news/federal-judge-rules-ice-arrests-at-l...
If someone breaks the law ICE or otherwise, there should be enforcement and justice.
https://www.govinfo.gov/content/pkg/PLAW-104publ208/pdf/PLAW...
Not only that but most people don't approve of his immigration policy.
https://www.economist.com/interactive/trump-approval-tracker
He is going against the will of the people with unpopular policies