Leftist Protesters Act Like Children During M103 Protest

This is some of the most childish shit I have seen in a while- and it's the reason we now have a video that is neither about M103, or either of the legitimate arguments to be made on both sides. 

Both these groups had a right to be at this protest, but it doesn't give anyone the right to assault or interfere, simply because they disagree with the other side.