Being the first woman to work there comes with a whole set of problems, especially if these guys are insecure. Good for you for breaking that ground. There's bound to be a lot of posturing and huffing about. They probably will tend to stick together on this and make you out to be the outsider. Good thing you're a strong person, but it does suck. I say stick to your guns, but by all means find a new job if this one gets too unpleasant. You can still be right even if you don't work there any more. Life's too short.