First responders and medical professionals famously often have a sense of humor too dark to use around outsiders without causing offence/outrage(like what happened here), but I'm quite sure they are not "making light" of the loss of life and terrible injuries they face and fight.
If you're arguing in good faith, you need to take about three steps back and realize what caliber of strawman you're fighting against here.
No, saying that the Armenian genocide wasn't just "ethnic cleansing" isn't "a great example of whataboutism."