The problem with threats like this is the west hasn’t and never will face the plethora of well armed and trained, organized, and intel supplied insurgencies that Russia and others in the axis of resistance face because the west are the ones who have spent years, decades cultivating them.

I’ve often thought of this but let’s say you want to hit the US. There are no groups you could give it to. The cartels in Mexico would never provoke the US like that and they’re the closest to a non-west affiliated armed organization (with greater than a few dozen members who could easily be killed) operating within 3000 miles of the US. Same in Europe. Most Russia could do without starting a war by handing them to a group not currently fighting and telling them to start would be to target the Zionist occupation of Palestine by handing such weapons over to groups in that region.

So it’s an empty threat without years of groundwork and millions of dollars. The only real options Russia has are to put more weapons into the Middle East that will stay and be used there or to directly strike without hope of denial or obfuscation at the west or their client states directly which looks like escalation.