Don't recall them putting a Amendment about shooting LEOs because u feel you have a right to something.
I have the right to be secure in my persons, houses, papers, and effects. The 4th Amendment is pretty clear.
To comment on something else you said, I don't think the country would fall apart if the Constitution was upheld.
If you honestly believe that you should probably get your head examined. There is no "picking or choosing." It's either constitutional or it's not.