You always here liberals whine "but worse is happening somewhere else," as if that was a justification for Saddam torturing and murdering thousands.

Using that logic, we never should have attempted to stop Hitler because Stalin was killing just as many.

Using that logic, the police should never arrest someone for, say, wife beating, as long as they've failed to arrest someone for murder.

Bascally, that argument boils down "you can't save everyone, so don't save anybody..."