You made the dumbass statement, so you explain it.
In a state like Texas or AZ, the killer would have had to think a lot more about it since there would be a better chance that some of the people in that mall could have potentially taken him down.
This very issue (restrictive New York State gun carry laws) was heard by the SCOTUS this Fall, and the decision is due within the month. It appears to have come a month too late from potentially helping these victims.
Notice that the criminal broke the law with is gun. Law abiding citizens have a right to defend themselves, and it's too bad that these people were not afforded the possibility of that opportunity.
Link: https://www.politico.com/news/2021/11/03/supreme-court-new-york-gun-permit-law-519045