At shul this morning, there was a guy standing next to me ranting in Hebrew. He got there around the same time I did, and was yelling at bochurim the whole time he was in talis and tefillin. At one point, I had to put my siddur down on the table to gather up my tzitzis, and he slammed my siddur shut and started pushing my arm when I tried to open it back up. I yelled "excuse me" at him in Hebrew a couple times, but just walked away when I realized I was going to get nowhere with him. At one point, I think the gabbai came over to calm him down because he was getting too rough with the Israeli bochurim. People were shushing the guy the whole time he was there, but he kept ignoring them.