Sorry, but you do not get to make decisions about Russian national security. Only the Russians can do that. And Putin DID explain his fears about missiles when he gave a speech to the Russian Defence Ministry Board in 2021:

"It is extremely alarming that elements of the US global defence system are being deployed near Russia. The Mk 41 launchers, which are located in Romania and are to be deployed in Poland, are adapted for launching the Tomahawk strike missiles. If this infrastructure continues to move forward, and if US and NATO missile systems are deployed in Ukraine, their flight time to Moscow will be only 7–10 minutes, or even five minutes for hypersonic systems. This is a huge challenge for us, for our security."

You don't get to dismiss what the President of Russia says or thinks. You just need to acknowledge it, respect it and calculate accordingly. The West did NONE of those things, so I don't expect you to, either.