I just read the fresh news about Malaysian minister not convinced with the evidence [1] and have to admit you can be right here. We'll see what happens next, but it doesn't seem entirely impossible that this bunch of officials is indeed just one nation too diverse to lie in concert.

[1] https://www.channelnewsasia.com/news/asia/no-conclusive-evid...

Imagine a similar incident in, say, Syria, investigated by an international team lead by Russians with some involvement of Belarus and Iran. Let's say they publish a report blaming US-supported rebels. Would you lend the same credence to this hypothetical report?