I really don't think it's a good idea to go around insulting those at Revava, or Bnei Elim. I just don't think it's good to insult other Jews in general. (Or Gentiles in general either.)
I think it pays to be able to disagree but with taste...keeping oneself above the abuses and insults that others stoop to.
With that said...I think Shas and Ovadia Yosef are scum.
The whole of Shas is a hive of scum and villainy. We must be cautious....
The same could be said of Chief Sephardi Rabbi Shlomo Amar. Bleh....