The issue here is that you're shifting the goalposts.
Here's a boiled-down transcript what just transpired between yourself and the other commenter:
You: NATO seeks to deploy missiles within 7 minutes flight time of Russia's capitol. That's bad, threatening.
They: But we already have Russian missiles in the middle of Europe, in Kaliningrad.
You: But those missiles are on Russian territory, so that makes it OK.
There's simply no logic in your follow-up. Either the concern is
missile proximity as you initially stated, or it isn't. And if it is -- you can't simply say it's intrinsically threatening and destabilizing when one country does it, but somehow benign and non-threatening when another country does (simply because in their case the missiles happen to be on their own territory).
Plus there's Russia's announcment of its intent to employ actual nuclear-armed missiles in Belarus, which no one has mentioned. Which would seem to make its complaint about non-nuclear deployments in Ukraine (which everyone knows will be exactly that) largely moot.