If they were suicidal, well there were other people in the cockpit who could have stopped them plus there were probably other more interesting targets to take themselves out with, and they didn't move to adjust to make sure they would hit - that looked like a long track. If they just point it at the airplane, one of the other crew members might have noticed them homing in on the airplane, or ATC, or they might have waited until the last second to do it, so that they couldn't be stopped. It looked like somebody oblivious to the airplane.
If you are normally flying low, one of them might have been wearing them just to keep an eye on the terrain/buildings/etc. 200 feet may seem high, but it's not. The ones I used, granted I wasn't a pilot or flying, were early 1990s era gear, and tunnel vision was an apt description, and I did drive with them and it was white knuckle the whole way. I hated them because depth perception was shit, and you could have people literally standing off to your 2 o'clock or 10 o'clock and not realize it. I know they have much fancier stuff now, but I bet it's still not the best for this situation, especially if they think they had eyes on what they thought was the proper aircraft while being in contact with ATC.