Ritter is an outspoken supporter of Putin and the Kremlin, even going as far as to visit Russia to give pep talks to Russian soldiers currently fighting in Ukraine. He obviously has contacts with sanctioned leaders in Russia. Additionally, as a former US intelligence official, he's held to additional standards that the average civilian is not. It's not unreasonable that he may face travel restrictions beyond those of ordinary US citizens. While this makes a nice headline, it's hardly news.
Ritter is an independent journalist who is being censored and punished by the US government for his views. Americans are losing freedoms, and this is just one example. Protections for freedom of speech and for the prevention of unnecessary searches and seizures like that of Ritter's bags and passport are enshrined in the American Constitution. How can anyone call Russia an authoritarian state while ignoring this blatant hypocrisy?