"History books will be written on this and countries will have to reckon—media agencies will have to reckon—with their major role in the genocide," said Dr. Tanya Haj-Hassan.
The only reason to call it a Humanitarian Crisis is if you're an active US Politician as it can be grounds for expulsion to call for military actions against an allied nation, and by recognizing a genocide the UN allows foreign intervention.
The way I see it, all genocides are humanitarian crises. Not all humanitarian crises rise to the same severity level of horror as a genocide, though, and genocide is the more descriptive and more accurate term of the two. If you only have time to mention one label, you should mention the genocide label.