I believe these eyewitnesses.
Missile plume burns out before 5.000 feet.
No vapor trails or plume.
Contrails from the jet, if anything.
I’ve been shot at by MANPAD over southern Iraq. I know what it looks like and how hard it is to see when you are in the jet being shot at, let alone being miles and miles away trying to see 4’ long non-reflective plumeless missile.
I believe these eyewitnesses.