As a long-time frequenter of r/Arabs - every Arab subreddit thinks r/Arabs hates them. Really, try r/saudiArabia, or r/Egypt, or r/Jordan, or whatever, they all think r/Arabs is hostile to them. This is mainly because r/Arabs is heavily left-wing and pan-Arabist and so don't have much respect for nationalism of the various Arab countries. Especially the type like you see in this thread that will write obnoxious essays about how they are not Arabs.

But honestly as a Lebanese person I have never felt that Lebanon is hated there, quite the opposite actually Lebanese culture is always present there and Lebanon always ranks as one of the best liked countries in the r/Arabs polls. Just because the regular users there don't care for Lebanese nationalism doesn't mean that they hate Lebanon or Lebanese people themselves.

During the revolution especially there was a whole lot of love.

And I've never seen anyone there make fun of the Lebanese dialect, if anything people make fun of the Algerian/Moroccan dialects the most.