Not more so than it already is. Kaliningrad honestly should not even be Russian territory. It was annexed by the Soviets in WW2, and should be Polish or Lithuanian. (since Prussia doesn't exist anymore)

Imagine China claiming some island off our coast during a war and keeping it after. It's like the perfect base to spy from for Russia. Saying that "you're putting bases too close to our territory" when their "territory" is smack in the middle of Europe and nowhere near Russia is just ridiculous whining.

They don't want America's presence anywhere in Europe, primarily because we are competition for their gas. Of course they will complain about destabilization.