Agreed, most of the responses here are ridiculous.
They bring snipers out anytime there’s a big event or a major public figure. Michelle Obama visited the University of Akron when I was going there, they had snipers all over the place.
They’re not bringing out snipers for some kind of perverted crowd control. It’s almost definitely so if someone shows up with a gun and starts firing into the crowd all the protestors don’t get shot.