To be fair Neltharion didn't receive an update in almost 1 year so i think it's quite reasonable for the community to get a little bit salty. Also the devs decided to open Lordaeron, an absolutely 0 profit realm (that is actually really well fixed, i give them that) and making all devs work only on it for months while also having Blackrock and Warsong that are only sucking resources money ('cos i don't really believe that either Blackrock or Warsong can be kept open only thanks to their own donations). After all that they make the suggestion to merge Neltharion with Frostwolf, firstly i don't get why Neltharion had to be their top idea since at the very least they should start merging Warsong with Neltharion, mostly because Warsong has 300 players max while Neltharion is normally sitting at 1.5k+ and seconly i think that Neltharion is actually a pretty big source of income for Warmane since most PvPers want to buy the best end game PvE gear, in fact i think that it actually competes with WotLK for the most profitable realm, MoP i don't get why someone would buy anything from MoP's marketplace, PvE gear is worth nothing in PvP and PvP gear can be earned by doing arenas @0 rating.
TL:DR version: people on Neltharion tend to be Toxic 'cos the realm has been neglected for almost 1 year and the fact that after months of patient waiting the only news for Cataclysm was a poll to close Neltharion sounded like an offense to most people (and rightfully so i might add).
Also if you call people **** i think they have all the right in the world to get offended and call you a douchebag in return.