I admit that what the OP is suggesting is possible, I just don't think it is a guaranteed outcome. Totally defunded police departments nationwide? All 15,400 of them? The cities perhaps, but rural locations are unlikely to allow it, funding depts themselves if need be. And I think that you are more likely to local militias than UN. Also, the thesis and antithesis do not seem contradictory to me. Rather than contradicting, the former would seem to justify the latter -- according to the progressive left extremists.
An amusing thought just occurred to me. If I am taking a limited view, is the OP taking an expansive view? What is the synthesis of the two....😁