The website consistently published pro-Russian propaganda during the Russian invasion of Ukraine, including the debunked claim that Ukrainian fighters were using civilians as human shields, and that the Mariupol theatre bombing was staged by the Azov Regiment to warrant NATO intervention. The Russian fake news website Peace Data republished articles by The Grayzone in order to build a reputation as a progressive and anti-Western media source and to attract contributors. False claims published by The Grayzone are referenced by many Twitter users who back Assad and the Russian government.
And that's from a curated web site well known to have a very strong leftist bias itself.
Kristof has always been a POS, and has been a notorious gun-grabber for the Old Gay Lady for decades.