No, you are sane. Some conservatives feel the need to make super extreme pro-violence statements anonymously online. I guess it makes them feel tough or like they are doing something.
So you are both comfortable keyboard 2nd-guessers who think an IDF sergeant who sees an activist terrorist with a coat on (quite possibly concealing a suicide bomb as has happened many many times before), moving on the ground, who could be about to blow up a suicide vest killing all around him..... you think you know better than that IDF sergeant whether or not to allow the risk that the terrorist has a suicide vest and is about to kill everyone?
I happen to think the IDF sergeant deserves ALLLLL benefit of the doubt, that if he judges the situation to be dangerous he is right to “shoot first and ask questions later.” He may have only a split-second to decide in such a case, and to be wrong is to be dead.... and soldiers around him will be dead, too.
The fault lies entirely with that terrorist and those who incited him, encouraged him, enabled him, and allowed him and his ilk to commit terrorism. The IDF soldiers must make life-saving and life-changing decisions in an instant (sometimes), and should be accorded maximum benefit of any doubts about how they judge terrorist situations. You were not there!