Personally i always do Bray HM as blm and while i do prefer a Bard or other blm i have no issues if a dragoon or Monk come either.
I have done it as Bard with another one and while not overly bad we would have been done much sooner if i was blm.
Same issues arise were players believe they "need" mellee because of limit break, but more often that figured like the large bomb in the last boss, a blm limit break works just fine.
There be jerks in every class, just play what you like to go as or find groups to go in with.