"someone on the ground mistakes an airliner for a military jet and fires a rocket into the sky..."
That is a theory at the moment that hasn't been proven in
a court of law,the Russians have a theory that a Ukraine jet
shot it down,again unproven in a court of law.....
Why is the Russian theory a conspiracy theory while the
US theory is treated as fact......both haven't yet been
proven.
A detective has a theory that persons A & B conspired to
Kill person C........that is technically a conspiracy theory
up until the point it is either proven or disproved in a
court of law......