Unless he stops being "stable".
There seems to be a big argument about whether the disgraceful number of gun attacks on schools in the US is due to the availability of guns, or to some cultural factor.
It's a valid topic for debate, but I don't think anyone denies that both are causative factors.
However, you can legislate for better gun control, and you can't legislate for "better culture", so there's only one course of action for the government to take.
Recent governments, (particularly, recent Right wing governments) have opposed doing the only thing that can do which would help.
Perhaps these marches will convince them that there are votes to be gained from changing that position