Let's see if I can figure this out...
You said this:
I feel that their concerns are irrational and they're likely being ignorant based upon those concerns. You make it out as though that, just because they have concerns, does not mean that they could not possibly be stupid or irrational. Whether or not they are stupid or whether their concerns are irrational is totally unrelated to the simple fact that they do have concerns beyond that one cannot have an irrational concern without being concerned.
No, it makes you concerned. Having a concern has no bearing on whether you're stupid or irrational was the point I was making.
If the OP, or anybody else, feels somebody with these concerns is stupid and/or irrational then that's their opinion and they're certainly entitled to that.
How are you to know if they're stupid or irrational or not?
Ok, you're right.
Anyone who disagrees with you is stupid and irrational.
Carry on.