I agree that the activity has little impact on the enemy.

However, I think it is more about building our guys morale by disrespecting the enemy. In World War II one admiral said he was going to see that the only place the Japanese language was spoken was in Hell. Gen. Patton talked about going to kill "those purple pissing Japs." Neither statement would pass the political correctness test today, but they did give voice to the anger felt toward the enemy and they probable did inspire the effort to defeat the enemy.

Sometimes political correctness saps the heat from the battle and makes the whole conflict look more cold blooded which also helps the enemy.