Really? A tolerance for dissent within the Democrat Party? Only if you don't mind being stripped of your committee chairmanships, have your business and private homes vandalized. Only if you don't mind being publicly called every name in the book and charged with racism, on top of it all (i.e. Hillary during the 2008 primary season by Obama and Jeremiah Wright). Only if you don't mind being accosted by any number of union thugs, or sought out and prosecuted by the DOJ; let's not forget those midnight raids on your home by Homeland Security and the FBI, if you have been implicitly found guilty of being a whistleblower or, in any way, voice your criticism of the current Administration, publicly.
And where are the dissenters within this party? Seriously. Is there a high ranking party leader who disagrees on the issues of gay marriage, multiple and/or late term abortions, spending cuts, on opposing a balanced budget, cutting back on social welfare programs, growing Big Government and the like? Answer: There are no leaders within the party who differ on these issues.
The GOP, on the other hand, certainly has embraced diversity, both political/philosophical and ethnic. No, Dorthy, the two parties are not the same.