The men who were there wisely used restraint in favor of longer term strategic goals. It looks like the local police were not doing much to protect the Trump supporters, and could well have been on the side of the protesting thugs. In that context, and in the overall context of the campaign, restraint and allowing the nation to see what leftist thugs look like they did the right thing.
While it would have been tempting to give the protestors a strong dose of their own medicine, in the situation the Trump supporters did the right thing, and showed the difference between conservatives and left wing thugs.
Then, that reasoning can also be applied to German men who have been constantly ridiculed as cowards on this site when they face similar odds. Maybe the people being victimized by Globalist scum should stick together a little better.