Also, I wonder how can the Democratic party can still be credible in denouncing Republicans efforts to suppress voters the right to vote when employing the exact same tactics during the primaries.
The criticisms of hypocrisy are fair, but only go so far. If they violated rules, they were rules of their own making, and not rights granted by the Constitution. Voting for a party nominee is a privilege, and if the party chose to limit the voting pool to party officials only, they could do so without violating anyone's rights. Bernie is free to run as an independent, and his supporters are free to vote for him. If the DNC somehow interfered with that, they would be doing what Republicans are accused of doing with the Voter ID laws.
That's like saying, "Lying is only a crime when you're under oath. Ergo, the party leaders are free to lie all they want and no harm, no foul."
Before we are too quick to call on the law to support our side, consider what happens when that same law is used against us by our opponents. Right now you may want DNC leaders in jail, but I think it would set a terrible precedent for private political activities to result in imprisonment, regardless of our distaste for them. Again, the situation is very different when peoples' Constitutional voting rights are denied (eg, voting in a real election). Then by all means, legal action should be taken.