> This should be very easy to answer, but no one ever does.
I don't think this is very easy to answer. The fact that people think it should be very easy to answer this, shows how naive they are, because the reason why country x think country y is a threat could include a lot of information and context that is not available to an external observer.
What threats specifically? This should be very easy to answer, but no one ever does.
NATO has had missiles at Russia’s border for 70 years, in Turkey, but that never resulted in a US special military operation to Moscow.