Definitely not very big, but tiny is an overstatement. https://andersonexpressinc.com/index.php?page=about-us, I would consider them small.

But yeah, to me, this seems more like a violent disagreement than anything on the level of the UHC shooting

That is and was the entire point of the nuclear armsrace back then, sometimes called the MAD (mutually assured destruction) doctrine.

Basically, you stock up enough to guarantee you can destroy the world and now no one can use it, without being, well, MAD.

But Putin might be mad enough to ignore that