If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
You might want to examine what sort of in-group out-group dynamics are at play here, as well as some related issues. I know I run into these things frequently--I find the best defense mechanism for me is to try to examine the root of where feelings come from originally, and why certain ideas are so threatening.
Some questions that you can ask yourself:
None of these will refute the claims, but they may help you understand your defensiveness.
I find it helpful to remind myself that I don't need to have a strongly held opinion on everything. In fact, it's good to be able to say "I don't really know" about all the things you're not an expert in.