Ah, being America; you're the bad guy when you interfere in other countries and you're also the bad guy when you don't interfere in other countries. The same people criticizing America for not doing anything today will turn around and start criticizing America for what they did, no matter what it was, if they get involved tomorrow. Everything you touch is your fault and everything you don't touch is also your fault.
Maybe, just maybe, America shouldn't be expected to insert itself into a Sudanese civil war. Maybe, just maybe, Middle Eastern and African powers should come together to deal with humanitarian crises in their own region and America should be, at most, a partner providing assistance only if and when requested.