Russia has some legitimate security concerns, given that they were attacked by Germany and lost tens of millions of people, and yes they still remember that. Given that history, it is stupid to put missles next to them, or airbases, or other threats. They simply feel they have to respond.
But if every head of household in the border countries had a rifle, Russia would stay on its side, and the border countries would stay on theirs. And their isn't much Russia could do about private citizens buying guns in another country.
Meanwhile, a few thousand troops would be very useful.
If no one apposes them, they are a juggernaught.
Who will appose them? Not our spineless leader. Not the spineless Europeans ... who?
That, plus institute the Swiss model of military service and schutzenfests.
I suspect you'll be attacked by a few of the emotional, unthinking folks on FR.