No A Sanders/Trump Debate Isn't Going To Hurt Democrats

The alarmist Democrats are going on how a Sanders/Trump debate will somehow hurt Hillary Clinton. To me, I can see it helping. There are a lot of Sanders supporters out there that say they will vote Trump over Clinton. But if they actually get a side by side comparison of Sanders and Trump, they might see just how ridiculous that is. That's not to say they will automatically vote for Clinton, but it would help take votes away from Trump, and I thought that was part of the mission?