The left is hard to become cult-y and dogmatic, and has plenty of in-fighting because it has its roots from old school liberal values of "think for yourself" and the rejection of hierarchy. The right values order and hierarchy so there is less factionalism and are more united. But the left could learn a thing or two from the right to be more structured without being dogmatic and authoritarian. I mean, the civil rights movement in the 1960s was successful because they have leaders to clearly express their demands, coordinate actions and excite people to join. In more modern leftist and progressive protests, there are no leaders and was facilitated by different factions advancing their own agenda. This is why the last major leftist protest, the Occupy Movement, in the United States failed miserably in my opinion. There are anecdotes of some people joining simply because it was the meme at the time.

Don't fret though and mistake that there has not been successful left wing demonstrations in other parts of the world in recent history. The National Union of Rail, Maritime and Transport Workers (RMT) in UK has been tremendously successful in making their demands. Watch the interviews of their leaders and their responses are eloquent and incisive, which leave opponents and bad faith interviewers lost for words, or even laughing with smart arse answers! The American left could emulate their British counterparts!