Maybe he noticed it was a hard target...too many guns in the crowd? So he moved on to the soft target.
Your the one suggesting he was conspiring with MAGA, not me. Maybe he didn't like all the guns around and decided he would shoot MAGA from a rooftop. Then maybe he couldn't find a venue where MAGA was near any rooftop, or maybe he didn't want any MAGA sprinting up to his rooftop. So being the coward he is, he went even softer from the greatest distance. For some leftists, any white patriot will suffice for the object of terrorism.
yet right after 9/11 the federal government enacted laws to increase security screening, change the structure of cockpit doors and change in flight rules on passengers in the front of the plane.. and since then....zero incidents. Not counting bitchy karens who did not want to wear a mask or drunk passengers who assaulted flight attendants but they were removed and banned so problem solved. So controls can work .