I disagree. Afghanistan used to be Soviet neighbor.
Russia has a lot of Muslims and the central Asian countries, from the former Soviet Republic, which are client states of Russia, are mostly Muslim.
The Russian Muslims are of the moderate type. If somebody would try to radicalize himself, he is quickly exterminated.
But, I am sure, Putin is supper worried about possible spread of the radical Muslim movement from Afghanistan into the Central Asia and Russia. If this catches on, you would hear of fighting in Central Asia. They must avoid that in any way possible.
That’s why they are already supporting the budding opposition. See bottom of this
https://www.foxnews.com/world/taliban-resistance-afghanistans-panjshir-valley
Tajikistan decided to support anti Taliban movement.
But, I am sure, Putin is supper worried about possible spread of the radical Muslim movement from Afghanistan into the Central Asia and Russia. ==
Russia of cause he worry about because it is his duty and he is Russian after all who loves his country and people.
Central Asia? I don’t think he worry about them at all. He worry not much of them as of Syria. He of cause may influence and invade there. But I’m sure it will be very limited. Not more than in Syria involvement considering sizes and all. Putin won’t spill Russian blood for CA sake. Here he is not different of Biden on this. If they find strength to fight he will help them. If not then he just washes his hands on it.
Again Taliban in CA may bring some pluses for Russia. It will spoil China interests there. Which is good)))..