In order to accept that statement, and it may be true, you first have to assume MORAL equivalency between Democrats and Republicans. I do not. It may be true that noboby is perfect(duh). Had 9/11 happened on a Dems watch I still think many people would back our leader. Of course I am sure a Democrat President might not have stood as tall as our current president.
No you don't..
All it takes is some mental aerobatics and rationalization.