I'm sure the DNC would want anymore emails stopped before being released to the public. What better way than to get the FBI involved. Hacking in my opinion is a crime, but it also enlightens people to what is really happening. Many suspected the DNC to conspire against Bernie Sanders and the hacked emails confirmed this. In some cases does this justify hacking to prove a wrong? I think pretty much the rise of a Donald Trump is directly the result of most American's not trusting their political system. The emails simple provide more proof of that and enhance Trumps popularity. Calling him out on his conspiracy theories of a rigged political system seem incorrect now. What's more I think its clear that whatever disagreements Democrat's and Republican's have with each other. Their club is resistant to an outsider. Even a Bernie Sanders is really not a outsider and that was evident when he caved and supported Hillary Clinton. He was afraid of being booted from the club. Guarantee his reelection would probably have not been supported had he not endorsed Clinton. These people all seem indebted to each other, which is why Trump is the party crasher. He brings fear to both sides who like the agreement they have going.
It's like the Hatfields and McCoys. They fight with each other, but they would gang up on any outsider who tries to referee.