You know, there may be some envy from these co-workers of yours who are dissing you. What kind of work life are they looking forward to? Plus, there are just a lot of ignorant people out there.
But I think you've got a lot going for you. I've studied some journalism (was quite good at it, while I was at it), and I have a great respect for people who have that kind of interest in truth and communication. It's a good background for what you want to do. How far along are you in your teaching studies? Have you had a chance to get into a classroom environment yet? If you haven't, I'd suggest you ask around and find a way to do it (volunteer if you need to), just to get a feel for yourself for how things can be. I think you'll be pleasantly surprised. Kids respond so well to someone who cares about them, and it tends to improve their performance and behavior, and you may find yourself with some really grateful parents, when you start teaching. 