It’s not my primary motivation.
Breaching a national border is a crime. The executive branch is obligated to enforce federal law. To hit stonewalls by local activist authorities in this circumstance should be illegal in my opinion. I’m not sure why you are dismantling an entire stance on states rights because I believe this is different than every example you’ve listed. If a lawyer or priest or anyone with a confidentiality agreement participates in harboring a criminal that’s a crime. If a sheriff or law enforcement does it it should be a felony.
If someone performing a background check finds a criminal with warrants, and when the authorities seek info then they tell authorities “I don’t think I’ll help with this investigation” they would be arrested wouldn’t they?
No. They would not.
Again. What you are calling “harboring” AIN’T harboring by any legal definition.