I'm just curious to know what upset him so much that he's so hostile?

I'm not sure that he's upset and hostile actually. I think that he just finds it (oddly) funny to play with people's feelings when Bitcoin price is going down. That's all.
You may want to read
this post and some of the ones after it on the similar thread on 30k for 10 days.
Many thanks for this your post just that I don't have Merits to give out if not I would have loved to merit your post. You have cleared my negative mind about this guy in question because for long I was like what a hell is this guy doing in this forum if he can have this kind of negative mind about Bitcoin.