It’s not a declaration of war until Finland attacks Russia. Until then it’s just more huffing and puffing. Nevertheless, it’s an unnecessary provocation on the part of Finland.
On the other hand, Finland is a special case. Unlike the weenies in DC, London, and Paris, Finland has some direct experience with Russian aggression (the Winter War of 1939 and 1940).
It’s starting to look like there are no sane people on either side. But if Trump should win in November, there will be one sane person. Hopefully he can bring a negotiated end to this mess before it spirals completely out of control.
No common border except the Baltics. Belarus is in-between. The Ukes have some unfinished business with them.