Michael Rubin asks the important question, at Commentary Contentions.
Sadly, the answer is all obvious. When Israel is involved, special standards are invoked that are not asked of any other country. That is, of course, the essence of bigotry.
Perhaps it is time for Americans, Europeans, and their media elite to reexamine their most glaring double standards: If Americans can kill a master terrorist targeting civilians then Israel too should be able to target Hamas leaders in Gaza, Damascus, Oslo, or Dubai, wherever they may be.