Letter: Reaction worse

To the editor:

Prof. David Guth’s Twitter comment about the National Rifle Association was intemperate, but the reaction to it was much worse. He was not threatening anybody and was exercising his right to free speech according to the First Amendment. Since by far the most deaths by shooting, except for gun-related ones, are caused by mentally unbalanced individuals, I trust that a positive psychiatric statement for gun buyers will be mandatory asap.