He hasn't got approval here, if the reaction from St Petersburg and other Russian cities is anything to go byYou need an element of approval, there is a history of people overthrowing their leaders there afterall.
If he continues to suppress opposition and quality of life appears to drop without the unifying/distraction act of something like a war then things could get ugly for him. Now he can say he pulled the west's trousers down and expanded the empire etc.