Obviously, it's possible (and I would argue 'necessary') to evaluate the things people say or do separately from whatever someone else might be saying/doing. 

Trump's comments and (alleged) actions are, independently from whatever the Clintons have done, reprehensible and potentially criminal. Any alleged crimes of the Clintons are completely irrelevant in regards to this. The Clintons' misdeeds don't 'justify' Trump's deeds, nor do they make Trump's comments and actions any less 'wrong' or (potentially) 'criminal'. Two wrongs don't make a right!

What Trump's accusers are claiming matches Trump's own words. And it matches a documented history of how Trump objectifies and demeans women. Therefore, I don't find their claims suspicious. Whether they are true or false remains to be seen, but to argue that these women are, by default, 'liars' or 'financial prostitutes' isn't based on proven facts, but on an emotionally biased opinion to defend Trump at all costs.