what does Shuster and MSNBC need to do make amends for the mistake?

This is not snark.

In my opinion, the suspension was both warranted and equitable. Do the Clinton's want more? If they want firings, who do they want fired? Shuster for one stupid comment, or Matthews for his litany of crap? If this is about Matthews, come out and say it - say that they want Matthews fired. It will never happen, but at least be upfront about it. Matthews will not be fired and the Clintons won't try open warfare with Matthews, because they might need to get free airtime on his show and he has too much juice.

If this was about anything other than political opportunity, it would have been over after a news cycle. It also would've been over if the HRC campaign was flying high instead of reeling from a string of defeats.

...when Clinton gave a nod and a wink to the methodical destruction of the rest of the field in the summer and fall?

Clinton supporter (previously Edwards), I thank you for articulating so well my conclusion about the real source of Clinton-hate.  

For months, I could not understand why so many seemingly progressive people spent their time repeating Republican themes from the "90s.  I finally realized that there are many people who have come of age hearing only aboput the fake "scandals".  They have no way of knowing that every singfle one in which Hillary was supposedly involved has been found to have no basis except fevered Republican imaginations.

The southern christians thought Bill was their Great White Hope because of his baptist church going and were impressed by his political savvy, charisma etc., and supported his political rise until they found out he and Hillary were Pro-Choice. That was a Betrayal of great magnitude and the abortion issue was the new big christian mantra back then that the christian/republican group got momentum from. The rest is christian coalition/republican smear history.