Live long enough, and see yourself become the thing you parodied
Truth matters in comedy where you have a message (Mitch Hedberg, for example, is excepted).
If you are trying to deliver a message, that requires that your basis for that message be true. Basically, if you're speaking truth to power, it kind of matters that it actually be true.
The Daily Show almost always had a message (and it is notable that when it didn't they could get VERY silly very fast). Therefore they had to actually try to be accurate. That Hasan does not get this is concerning.
The left-wing trend toward making it all about feelings has been extremely unwise, given they could see how it was working out for the right wing - i.e. whenever it was about feelings the right wing won. You can reason people out of conservative impulses. You cannot feel them out of conservative impulses.