Are you saying it was OK for the BLM protesters to break the law and commit acts of vandalism because (in your mind) their cause was good?
Did most BLM protestors do this or just a minority?
I don't seem to remember BLM causing anything like as much violent mayhem as the current lot - and indeed seem to remember most of the trouble was caused by white supremacists deliberately mixing with the protests and causing trouble.
You appear to be (rightly) criticising Nigel Farage for deflecting the blame off the rioters, and then doing exactly the same thing yourself that you've just criticised Farage for. He's somewhat trying to deflect the blame onto immigration. You're deflecting the blame on to politicians who call for lower immigration. But you're both trying to deflect the blame. Why not just agree that the rioting and attacks we've seen are utterly awful, despicable, and unacceptable, and the people to blame are the rioters themselves.
The rioters are indeed primarily responsible, and it should certainly be the rioters and those who incited them to riot online who should receive the full force of the law. However in the past 10-15 years we have had an environment in which it has been increasingly seen as "OK" to have strident anti-immigration views.
By the way, in your World, what are those of us who believe that immigration is too high supposed to do? Are we supposed to just shut up about our beliefs and never say anything, just in case some idiots and far-right trouble-makers start mis-using what we say?
What else is the government supposed to do? The Johnson government gave those with such views their beloved Hard Brexit. Cleverly introduced a raft of very tough, IMO, measures last December. And yet still it's not enough, apparently. Still people complain, and complain, and complain. And I don't think people would complain nearly as much if we hadn't had very public figures constantly tell us that it's a major problem when, to my mind, the real problems lie elsewhere.
To be quite honest I don't think the people participating in these riots will be happy until we completely block immigration from third-world and Muslim countries in particular.