I disagree somewhat.
MSNBC and their hosts are obsessed with Conservative Republicans to the point that is all they talk about.
Sure, the talk is smearing, degrading and mocking them, but that is what they do - the Alinsky tactic of making it personal; and then destroying the person.
There is little to no talk about Liberal solutions to problems, just maintaining the status quo.
No, it is all part of their political activist strategy.
In POTUS election years especially 2012 this ‘they are coming for YOU’ message is especially effective in getting non-whites out to vote against the GOP.
That is what you are seeing.
Off year elections like 2010 and 2014 it is less effective,
Dems now outnumber Republicans so its ‘get out the vote’ game.