2 things:
1) I understand hawks fans will always preceive this differently but what exactly history of Delly is there? He wasn't known as a dirty player in college, wasn't known as a dirty player in the last 2 regular seasons. His rep has always been a hardworker, but its not like hes throwing elbows every time someone annoys him (hmm Howard), I would say having a "history" is a bit of a exaggeration.
2) Lets be honest here, Al Horford ended TJ Ford's career on a very "questionable" foul. I get that the guy has been a model citizen since then, but if we're going with the standards that you guys are applying to Delly, Horford is no saint either.