while I am not an Obama fan in the least, you do realize there was a proliferation of smart phones & social media platforms during his Presidency. Before that it was rare to have video proof of incidents. I think Obama being the president during this was merely coincidental
No it started when He was running, People got fired for disagreeing with his policies in some places called it racist that didnt happen so much before
Gained steam from there, We had people fired for donating to prop 8 , I remember mobs sitting outside restaurant until they fired some waiter that donated $100
Yes the tech improvements had a lot to do with the fire gaining steam and keeping momentum, but the mob mentality started when Obama announced he was running