If he was a real problem, they would have put him down by now. If they didn't allow protests, they would be cracking skulls.
Fixed that for you.
I'm saying that if Russia was oppressive as people are making it out to be, he would be silenced by now.
I present 4 possibilities: 1) If he was important and silenced, the claim that Russia is oppressive would hold. 2) If he is not silenced and important, there would be support for him within his own country, but then the country wouldn't be as oppressive as people make it out to be since he hasn't been silenced. 3) If he is silenced and unimportant, we would hear little to nothing of him. 4) If he is not silenced and unimportant, then he has a chance at getting attention from our news outlets that are always looking for an excuse to paint something has a humanitarian crisis as a pretext for war.
Whenever he shows up, the venues seem to be either cancelled outright or suffer from all sorts of electrical and infrastructure problems all of a sudden. Couple of times he chose to take his message to the people outside the closed venue, he was egged, with police preventing his followers from chasing the perpetrators. Of course, those are also the images that TV stations choose display whenever mentioning Kasparov in passing.
When you control the media, it's easy to hand-pick quotes and stock photos to portray even the most eloquent and intellectual speaker as crazy bum who's shouting in public places to gain self-promotion.
All in all, Kasparov has an incredible brain that, regrettably, peaked in its performance and application when he was a chess player. I left Russia over 10 years ago (meaning that I've spent most of my adult life in the Western world), and yet even when I was there it was bloody obvious that Kasparov was on the US payroll. The fact that a smart and practical person like him continued on the same path only cements my impression.