You know what we need? A God old fashioned alien invasion (a winable one of course). But even then I bet some fuckers would side with them if only to be eaten at last
Depends a lot on the invasion, yeah. If it's space capitalists looking to banana republic a planet, I'm not sure there'd really be much resistance to begin with

Plenty of other stuff, too. Maybe jesus comes back with that alien armada revelations probably promises, turns out he was buddy cop with muhammad, krishna, and buddha the whole time and bam, you'd have like maybe a third (allowing for sectarian disagreement and whatnot!) of the planet roll over without hesitation.