he certainly didnt read his history books, otherwise he would know not to land with a ahab reactor on his back... besides that?
the gundam armor was on his way to a heavily populated city, just by snipping it from afar he succeeded in diverting it to a less populated farm...
he is not in the "wrong" of bringing a mobile suit to arrest a treacherous leader, nor trying to save more people... we as viewers see the whole picture and know for a fact he is doing mistake after mistake but from his point of view he is right