I don't think Idaho would tolerate another Ruby Ridge, nor Texas another Waco...and those responses would be much more than grass roots. Sherriffs in various locales have already made this clear.
The sad thing is there are big cities and other states even that would invite in Federal tyranny.
Some have, yes. And some police chiefs have made quite clear that they will enforce any and all gun-grabs. The vast majority have said nothing at all. Not in public, anyway. I can't say that I blame them ... but I am grateful for those who have said they will tell Fedzilla to GFO.
What I am far more interested in is what the rank-and file agents and officers will do. Some will say GFY (and actively resist), some will get the blue-flu, some will enthusiastically carry out the orders of The Emperor. This applies at all levels. I think we would be foolish to under-estimate the percentage of patriots in Federal agencies, and foolish to overestimate the percentage of patriots in state and local agencies.