dude its probably a coincidence
this
also, if they really did target some cargo plane, and the missile decided to hit the bigger target (aka the plane that happened to be nearby, and yes, the missile can actually do that), it would have been one forgeted up accident...even though it'd still mean fatalities whether it hit a commercial plane or cargo plane
it also sucks that another 777 goes down in the same year...literally no one died in a 777 incident until about a year ago...