So you want to say that the reason for _not_ doing this is: it will distract from the effort to stop the cleansing.

Would that be the same as saying that we shouldn't issue a warrant against a school shooter because it wouldn't stop the shooting? Would it distract from gun laws?

Maybe not the best analogy, but I know that I cannot say for certain whether it will negatively or positively affect the effort. It might positively affect if this makes (especially EU) countries put more pressure on Israel.