Those are pretty common refrains. Honestly it means nothing to me that rioters may have said them.
Especially considering as a rioter the police are the guys who want to stop you from rioting & looting, when you want to continue with the rioting & looting.
No. The asian shops were targetted, just like in the LA riots. These are hardly rich, but the shopkeepers represented "model" citizens and what the ideal migrant looks like. The looters represent the reverse.
What do you mean 'no'? The reasons for a bunch of ignorant kids looting doesn't have to reflect their actions. If they could realise who they're hurting they wouldn't be ignorant kids now, would they?