So it's OK to bomb terrorists (i.e. ISIS/L), causing death, pain and disfigurement on their own territory, but giving them a slap or almost drowning them in your own territory is a no-no?
I recall the movie "Mississippi Burning". One of the characters (FBI men) complains that they are operating in the gutter. The response being "well, if they crawled out of the sewer, then perhaps the gutter's the place we ought to be".