It's weird when stuff is phrased like this as it puts the blame on the train rather than the cause of the accident (freight trains have stopping distances in the region of a mile of distance, and easily take more than a minute to do so). Should be "military vehicle causes train crash" or similar.
I think you're just overthinking it maybe. To me, I picture a train crashing in to a vehicle that's on the tracks. Train smacks in to military vehicle. Blame isn't even in the equation but I can boldly assume as to why if it were too close, or on the tracks.
But yes it's mostly all weird, click-baity sensationalist horse crap.
But yes, entirely human factors here (in this particular case it seems like whoever planned the route didn't consider clearance issues when crossing tracks :-/)