In one of the Dorsai novels (if memory serves) there is a war with mercenaries involved. ANyway the usual way is to accept the surrender of opposing forces who are fleeing , surprised in bunkers, etc. But the guy who fires a handheld missile at you , misses, and THEN tries to surrender....
If this is true, and I have no idea if it is, I suggest the IDF not employ anymore idiots who don't have the sense to keep reporters away from what they do.
One of three things happened here and two of them are bad. First, it didn't happen. Second it did occur (as it often does in war) and the shooters were too stupid to keep it quiet. Third, Sharon wanted this to be known.
The latter is the worst scenario. Executing Palestinians isn't going to scare people who strap bombs to themselves and blow up women and kids. All it does is feed into the moral equivalency argument against Israel.