I vehemently disagree with the violence a few of these protesters have been perpetrating; however, let's not forget that non-violent protestors at Trump rallies have been punched and kicked as well. To say that those on the right are less violent is bullshit.

The FBI says:

During the past decade we have witnessed dramatic changes in the nature of the terrorist threat. In the 1990s, right-wing extremism overtook left-wing terrorism as the most dangerous domestic terrorist threat to the country.

On the national level, formal right-wing hate groups, such as the National Alliance, the World Church of the Creator (WCOTC) and the Aryan Nations, represent a continuing terrorist threat. Although efforts have been made by some extremist groups to reduce openly racist rhetoric in order to appeal to a broader segment of the population and to focus increased attention on antigovernment sentiment, racism-based hatred remains an integral component of these groups’ core orientations

Right-wing groups continue to represent a serious terrorist threat. Two of the seven planned acts of terrorism prevented in 1999 were potentially large-scale, high-casualty attacks being planned by organized right-wing extremist groups.

Let's add on to this:

USA - Knoxville church shooting (2008) USA - Keith Luke rape and murder (2009) USA - Anti-abortion murder (2009) USA - Sikh temple shooting (2012) USA - Jewish Community Center shooting (2014) USA - Charleston black church massacre (2015) USA - Lafayette cinema shooting (2015)

I'd say that the violence perpetrated by these protestors in the past few weeks pales in comparison to what right-wingers have perpetrated in the past, and what some right-wing presidential candidates have suggested in their own rallies. Hint, hint -- Trump.