I think what people are talking about in your link is the picture of the guy holding a rifle above the tweet. He supposedly "Sam Hyde" who has been floated after every shooting over the past 6 months.
He’s a comedian who used to write for Adult Swim on Cartoon Network IIRC.
He has a YouTube show called “Million Dollar Extreme”
They were looking at somebody elses post not the one I posted, which is shown in #365. That person has an ongoing commentary: https://www.facebook.com/suzanne.grace?lst=1035564170%3A776269741%3A1521651392