I don't think it really "isn't true at all". While I agree with you, by and large the US military are very competent and truly patriotic, you yourself mention a "schism group of crazies" who would circumvent things. I don't think it's likely they would take over comprehensively, but I worry that the possibility of some critical mass succeeding is there.
I think the US is far more likely to wrangle around what a "lawful order" is than many other countries.
Thanks, that's a good overview.
Schedule III is still too harsh, imo, though.