They are demonized by the left precisely because they are PERFECT for self/home defense, and not crime where they usually are concealed.
-30 round magazines make sure the home owner doesn’t run out of ammo before the adversary does.
-mid caliber rifle gives good firepower relative to handgun while not being too big in close quarters.
-Lots of cheap abundant parts and ammunition.
You left out that they do make one hell of a club if you run out of ammo.