I just want to clarify Belarus does _not_ border Kalinigrad. You'd either have to pass Lithuania or Poland.
If that happens, the Baltic states should be worried.
In my opinion, it won't though. It's neither a threat nor a direct strategic advantage. It won't connect Kalinigrad. Belarus is landlocked. The population did not and is not asking for Russia assistance in any way, only Lukashenka did. While not super friendly, they're friendlier than to the EU bloc. I think it's just not worth the trouble and an eventual net-loss.
If that happens, the Baltic states should be worried.
In my opinion, it won't though. It's neither a threat nor a direct strategic advantage. It won't connect Kalinigrad. Belarus is landlocked. The population did not and is not asking for Russia assistance in any way, only Lukashenka did. While not super friendly, they're friendlier than to the EU bloc. I think it's just not worth the trouble and an eventual net-loss.
Unless, they have bigger plans, of course.