A vow, in today’s world, doesn’t mean much.
Anybody sincerely devoted to overthrow of our government wouldn’t balk at lying.
The problems in our country have very little to do with disloyal naturalized citizens. Most of our problems arise from disloyal but impeccably natural-born citizens.
Largely yes, many as product of antiChrist secular seminaries (universities) poisoning the well with a victim-entitlement ideology from Hell.