There are two parts to this. Switzerland deciding that he can't stay, and Switzerland deciding that he must be sent to Russia.
The article explains why Switzerland doesn't want to grant him asylum, and that's something up for endless debate. What I don't get (and the article doesn't mention), what's the issue preventing him from going to Ukraine instead of Russia? Switzerland wants him gone from the country, he wants to be gone from the country, what's keeping that from happening?