Fuller considers himself a political operative. His business card reads in part:

“Expediting Initiatives since 2006”
“J. Eric Fuller”
“Political Circulator.”

I think it is possible that he is already political and already biased against conservatives before the shooting.

He made the threat right after it was suggested that it would be better not to talk about gun control until after the funerals of the victims.

it was inevitable that the conversation would eventually turn to politics. It did, toward the end, with Amanpour leading a discussion on a very touchy but obvious topic: gun control.

That’s where the atmosphere turned tense. When Tucson Tea Party founder Trent Humphries rose to suggest that any conversation about gun control should be put off until after the funerals for all the victims, witnesses say Fuller became agitated. Two told KGUN9 News that finally, Fuller took a picture of Humphries, and said, “You’re dead.”