That's easy to say without bullet holes in your buildings and bombs being found every few months in your capital.
IMO the US public is presenting so warlike because they never experienced war directly to a scale of WWII as a populace, especially not in living memory.
War does not look like "let's use all our guns and go kick commie ass", especially resisting an occupation. It looks like your hometown burned and poisoned, never to be rebuilt in your lifetime. It looks like people you know and care about dying, being raped with impunity, or just plain disappearing. If you pick up a rifle, you are going up against trained and experienced and also more importantly, quite desensitized enemies who have been doing what you are planning to do for months if not years. And even if you shoot one, they will hang ten of your townsfolk tomorrow.
Just look at Mariupol and Gaza and think whether anyone would thrive in that environment.