They were on an open hill top with little to no cover, standing around, for an hour. If they were a threat they would have been dealt with in seconds, not a fucking hour.

Also the Israelis are using optics on their tanks that makes 1km look like it’s just down the street. Hell I had those optics in the US Army 20 years ago.

Furthermore it wasn’t just the tank. It was a base which means if for some godforsaken reason that tank hasn’t had an optics update since 1970, then they could easily have called over someone with good optics. Hell we have cameras that can see several kilometers. The guy they got on the radio with likely sat in an air conditioned room looking at a TV screen.