I would argue said person isn't actually "independent" then.
> this person might be perceived as threat
Only by a hysterical person.
This is incredibly insulting, especially since you've thrown it out curtly with no explanation. While I personally am not threatened by a person voicing their gun enthusiasm at work (giving all benefit of the doubt to the hypothetical gun enthusiast, e.g. it's not an out-of-the-blue zealous fervor), but I can easily imagine a non-hysterical person feeling threatened if they have zero experience with gun owners and zero context with which to personally relate to gun owners. Try to have at least a little understanding of other people whose experiences are not your own.
> If co-worker comes to work and says guns are bad. Ok whatever your opinion man. But if they come to work and like yo guns are awesome, 2nd amendment bros. I own one, then for other side this person might be perceived as threat.
If you genuinely feel like you have been threatened by the above to the extent that your work is now an unsafe place for you so conservatives should keep any chat about their guns to themselves, I'm sorry, but you are having an extreme emotional response disconnected from reason. Aka hysterical.
> I can easily imagine a non-hysterical person feeling threatened if they have zero experience with gun owners and zero context with which to personally relate to gun owners
Look, I can see how someone might have been brainwashed to find all guns so scary that the concept of someone near them who isn't a police officer having access seems like a direct threat to them...just like I can see someone being so brainwashed as to view all African-Americans as innately dangerous and feeling unsafe working with them. But in both cases I'd claim you are being irrational to an extreme sufficient to call your reaction hysterical.