For the same reasons CptBork and RainbowSingularitz are so happy about it that they immediately use this claim as if it is a well-established fact and use it for anti-Iranian propaganda.
I'm not happy about this shootdown at all, most of the people on that plane were dual Canadian citizens, some of them from my own hometown, it's possible I might have even personally crossed paths with a few of them once or twice. I hope our government and the victims' families sue the pants off Iran around the world and seize whatever assets the Iranian government owns in Canada until it agrees to pay billions in compensation.
If one wants to look at the evidence, https://www.moonofalabama.org/2020/01/pentagon-accuses-iran-of-shooting-down-a-ukrainian-plane-but-its-evidence-is-flimsy.html is as usually worth to look at.
So you have hundreds of independent news agencies and governments around the world reporting that Iran shot it down, we have Iranians releasing home videos of the shootdown, and you casually dismiss it all as propaganda with no analysis whatsoever. Then we have some vodka-swilling fifth column Putin fan club like Moon of Alabama making up self-contradictory bullshit as always and you accept it as indisputable fact. If you can't understand why Iran is delaying Ukrainian inspectors from accessing the crash site even though it's their plane, just as inspectors were blocked and delayed by Russia after every major chemical attack in Syria and the MH-17 shootdown, just as every nuclear monitoring site in Russia suddenly shut down for a week due to a "glitch" (faulty Windows update maybe?) when their crappy nuclear cruise missile went kaput...
When people act like they have something to hide, that's usually because they're actually hiding something, and it's hard for myself and others here to believe you're really stupid enough not to see that.
There is, of course, none. Except as a false flag, so that one can claim that the political enemy made it. The usual cui bono. MH17 worked nicely for the anti-Russian propaganda, so why not repeat it? For people like CptBork any "highly likely" by some Western politician will be sufficient, evidence is not even necessary.
Of course evidence is necessary, and when a bunch of flat-headed retards suddenly showed up at the MH-17 site with guns and denied inspectors access to the evidence while they looted everything, it shows that there's something they don't want the world to see... except in cases like yours- there's nothing that needs to be hidden from you personally, because your eyelids are permanently half-closed and you miss a lot of obvious details as a result.
So, let's hope that the propaganda simply misuses here a technical incident for anti-Iranian propaganda, instead of organizing this incident themselves.
There's plenty of video and evidence that the plane was shot down, do you think a flying saucer did it? Speaking of hopes, even Iran now claims they didn't really intend to produce US casualties in their recent attacks, which means their initial state news agency claims of killing 80+ was an obvious propaganda lie just like most of what comes out of their mouths (and yours), and your fantasies of 50+ Americans dying and being covered up are about as realistic as your chances of showering regularly or seducing a pretty girl.