Wouldn’t that same opinion then justify a violent riot in LA (if there actually was one)

No, in their opinion it wouldn’t because cops were protecting America from criminals.

if the protesters believed due process law was being violated?

Those among them who don’t know what the rule of law is can’t care, those who know don’t

They can’t logically or rationally say one is right and the other wrong.

They don’t have to be logical or rational, deciding what makes an exception is exactly why they’re in power.