That's actually a good point. I'm sure the Emperor was keeping tabs on the Mandalorians and would started to move in if his minions were doing well. Then we would see the Jedi go to war. This is what they were waiting for, but I don't think the Jedi would have much of a chance once the Sith Empire steps in.
Which is why the Jedi philosophy was basically wrong. If they waited until the Sith Empire revealed themselves it would have been way too late to save anything.
This is why essentially Revan was right. DId he bring untold war and destruction to the Republic? Yes he did, is that horrible? Yes it was, however it was only through his actions of delaying the Sith Empire that the Republic survived long enough to rebuild. If he didn't fight the Mandalorians, then turn against the Republic, etc this wouldn't have ever happened. Thus his actions had to happen, this is why I believe that Kotor 2, story is superior to just about all other Star Wars games, there are no real good guys in this story, no good vs evil, it is flawed vs flawed.