All right. First off, it is important to note that the soldiers you see here are National Guardsman. This is an important distinction, because these soldiers do not receive as much training or experience as active duty personnel.
Second, somebody clearly screwed up here. Driving trucks underwater with the windows open may be a technique, but it is one not found in any Army manual of which I am aware. Unlike tanks, these trucks do not appear to have fording kits.
That said, these soldiers deserve respect for selflessly doing their duty by helping the people of New Jersey during Hurricane Irene. The gentleman on the bridge deserves nothing but contempt for insulting people who are there to help him.