We applaud Russia for bombing ISIS. Supporting Assad, no so much.
Russia initially started bombing ISIS with marginal results and then its attention turned northward Syria were largely anti Assad forces are entrenched, because that's the real reason Russia is in Syria: to prop up its proxy. Now it seems any and everything we don't like in the region is 'ISIS' when the truth is far more complex.
At this point, Assad is the least bad outcome. If Assad doesn't win, ISIS gains control of Syria. How is that better?
Assad is a brutal dictator, but I've come to the opinion that the only sort of rules which Arab Muslims respect are Brutal Dictators. What toppled the Shah of Iran is his Jimmy Carter engineered restraint from brutality. The opposition perceived it as weakness and made their move.