Nobody wants to immigrate to Russia; even Russians aren’t that fond of it.
And why would Russia want the expense of supporting its own Islamic operatives when it can use the welfare systems of the west to feed and clothe them? All it need provide is training, and keep on helping western socialists milk their countries dry with welfare programs to support the parasites.
You may be correct to some degree. However, it isn’t Russian doing or fault that the West has allowed almost free immigration to the West & no less paid those in question in welfare. These people came to the West because they could/can and get paid welfare according to western laws the west determines, not Russia.