“The variable is the character of those who are armed.”
That’s what made me nervous about the people advocating arming all the teachers.
Yup.
Guns are just a tool, they can be used for good or evil, like any other tool.
Nobody really advocates arming “all the teachers”. I work with teachers and I would trust most of them to be armed and the rest as long as I was also armed. But arming teachers is a self-limiting proposition. The most liberal wouldn’t want to be armed for a variety of reasons like fear of guns or accidentally firing them. Some would oppose them because they are pacifists. Thus most armed teachers would be conservative and would therefore be smart enough to not use them unwisely. You might get the occasional jihadist but other armed teachers would likely be able to prevent that from being too big.