I admit: I am not a NRA certified firearms instructor. Perhaps I should consult Karl of KR Training (official firearms trainer of WCD) before posting this.
Then again, this just seems like common sense to me.
When you’re teaching classes, a little humor is good. It keeps the students alert.
But you might want to avoid the racial jokes. Doesn’t matter if you are a minority, doesn’t matter if you’re an equal opportunity roaster, somebody’s going to run with this and try to make you (and people of the gun in general) look bad.
Again, nothing wrong with jokes: I’m just saying, steer clear of the racial ones. Probably ought to stay clear of sexist ones, too.