From what I've seen on this site some Hillary supporters, seem

[Hortensis]

134. Look, the GOP is PRAYING Bernie takes Hillary out.

They desperately need a break in this truly dreadful, for them, election.

Today's criticism of Bernie is so incredibly mild compared to what the GOP has waiting. Even if Bernie loses, their lies and twisted stories about Bernie will be used like a several-month barrage of missiles to illustrate all that's wrong with the left. That's if he's NOT the nominee and most of their attacks are aimed on Hillary.

If Bernie were to become our nominee, approximately $1 BILLION in right-wing funding would be devoted to ripping this secular Jew, socialist, out-of-wedlock father (and THESE are just some simple truths to begin with), etc., etc., etc., etc., etc., etc. to shreds. Just wait until the Religious Right alone gets to work on him.

As for research, I've read just about everything published about Bernie's background -- except his own co-written book and published speech. I tend to pass on those for any candidate. I doubt even one of his ardent supporters have done that as even friendly coverage has a way of offering at least some of the criticism they find both intolerable and false-by-definition.