We've done that too much already. And, people get killed in war. We don't want that. We needed a word, so we focused on ethnic cleansing. We will go to war against that.
Civil wars are treacherous things to jump into, just like family feuds.
The only thing that unites the participants in such fights is their anger at the intruder. Look at the people who get shot trying to break up family quarrels. It is time to do some serious thinking. Once committed to ethnic interventions, the list of possibilities is endless. The first few ventures into these unknowns are scary, unnerving.