Do these "protesters" even know what the hell they are protesting at this point? Don't they come across as sanctimonious a-holes?

They are nothing but bored 18-22 year olds who are out of school, have nothing to do and are ignorant of the facts. 

Yes, they know they are protesting murders committed by police officers.

you have to ask the protesters this question

i would hope they know and they should know enough to quit too

Look in the mirror . . . that's what the protest is about.

I think people were also protesting the lockdown.