TBH there is a whole generation who are realising quite how screwed they have been over the last couple of decades by the 'pay it later' short-termist baby boomers, they have been promised, through politicians, the media and the fatcats that if they work hard, they too can share in all the success, except that for the youth entering the work force these days there are 50 people are competing for every job, commodities of all descriptions are running low due to rampant short-termism, housing is unaffordable to all but the privileged few, education is massively more expensive, all to pay for the idiot older generation who now refuse to compromise on their unfunded benefits and enjoy their retirement off the backs of the young people they have left completely in the crap to pay for it all, and on top of it all apparently woefully unprepared by parents and the state for the situation they find themselves in.
That said, I doubt many of these retards rioting understand or even know about any of the above, or even why they are doing it, but my suspicions are that when you have such a negative climate of unfairness and resentment building up then those least capable of expressing or understanding it are more likely to rage out in the form of civil unrest.