Breh, I'm not the biggest Sanders fan and while I love ribbing on Sander's supporters now and then, this is just the internet and its not that serious for me and I don't mean any real malice in it.
Despite that, it can't be denied that Bernie has a base that very much believe in his message and platform. What possible negatives could ever come from being accommodating and welcoming those individuals and having their preferred choice speak? It's ridiculous to not give that part of the party a voice when you're trying to win the general election.
Even though there are Bernie Sanders supporters who stated they wouldn't do so, I've always said if Bernie won the nomination, I would vote for him. At the end of the day, he falls more in line with my beliefs than Donald Trump and all associated republican party members.
Trump pretty much already stated he is going to delegate a lot of the day to day business in the white house to Pence who can't be anymore neo-con if he tried. Would take bernie over that any day.