Oh yes they benefit. They have lost on the ground so their idea ( with CIA guidance) is to try and destablize the Russian government and create a color revolution.
Attacking citizens instead of military targets will backfire on them.
How ?
“destablize the Russian government and create a color revolution.”
So terrorist attacks against civilians in russia would somehow make the Russians overthrow Putin ? Utter nonsense.
Just like they're doing in the US.