Why don't you actually read what the Instagram official stated. They have taken down several accounts claiming to be the school shooter -- nearly all created after the shooting.
https://www.snopes.com/did-shooters-instagram-picture-maga-hat/ The claim that this account was made after the shooting in order to frame Cruz as a Donald Trump supporter can also be debunked. Before this account was deleted, several outlets took screenshots of the images on this Instagram page which included time stamps dating back months before the shooting. The following photograph from Fox News, for instance, includes a time stamp from July 2017:
I was in San Francisco two weeks ago, and the trash I saw there beats any Floridian city ten times over. That's your home pad, right?
If you go actually read information in detail. The account showing with guns is his. The one with "him" wearing the Trump hat likely is not.
You’re lying about being in San Fran, I live in So Cal but use to live there. I will never deny parts of San Fran is a dump but Florida just attracts the sludge of the gene pool.