Well if they come out and say he was ISIS now it would certainly help erode any last bits of trust American people have for American Government and FBI. I could totally see that honestly. Like ISIS provides some smoking gun proof of connection to Paddock. Who knows though, Americans might not even care by then so it won't even matter. I bet most people wouldn't even recognize Omar Mateen's name today. It would probably take ISIS proving they did Vegas along with another new shooting before Americans are out in the street with pitchforks. I guess anything is possible though when you have all the media.