Where does the idea that teachers are against guns on campus come from. I don't believe I've seen an actual study-just opinions from non teaches, admins, and union management.
I was a teacher for a few years. I hunted with teachers, I shot with teachers, I bought guns from teachers, and teachers got me into black powder. Granted, that was long time ago.

Note that any poll can be framed to get the answer you want.ie "Would you rather be shot than splashed with water?" Splashed with water =antigun. or "Would you rather be shot dead while begging for your life, or would you rather have a gun and defend yourself?"

Ask to see the actual questions.