yes, even poland is interested in "security". do we mean military, political, economic? power relations can have multiple avenues.

threats thus far haven't prevented the expansion of a missile defense system.
this system provides for practical security for the EU and economic security for russia.
thus no serious action will be taken by russia that will result in the drawback of this system. to do so would be for russia to harm its own economic prospects. however, to threaten to do so provides a benefit for its political regime.

if you take a static, one-sided approach to international relations, you won't actually be able to make any useful assessments. you're linking to a bunch of pre-russian-election rhetoric as if it means that the russians are about to start invading poland as the first step in re-establishing a soviet union. but they don't follow through with their threats: there is no withdrawl from new start; and we find today's agreement to allow future diplomacy to take root - that pre-election rhetoric was only rhetoric!

yet we can see that there is increasingly unbreakable economic incentive for such rhetoric to not become reality, and also political incentive to keep talking about it as though it were divisive.

the issue remains up for discussion, but it is a non-issue - and that is the way that those in power want it to be.