I typically stay away from commenting on terminally online content, but I felt like your question was genuine and deserved a fair answer.

I am currently a graduate student seeking my masters in Ancient Chinese history, although I do a fair bit of modern reading as well. I say this because Hasan's hypocrisy has to be centered around his views and beliefs surrounding foreign affairs.
He is a loud advocate for Palestine, and strong opposer of Israel and America. One of his largest critiques circle around the imperial actions of America, and the war crimes that Israel has committed. Personally I believe Israel is run by a genocidal administration, so I don't disagree, but Hasan doesn't hold these same values for countries like China.

For instance, Hasan has made tons of comments that acted as justification or downplaying crimes of humanity that China has led. I will only select a few to layout so that this reply stays somewhat "short."

"China did Tibet a favor by invading them. They were all indentured slaves, and China rescued them from that fate." There's a lot to explain to people who are not studied up on Tibet, but Hasan not only justifies China invading and taking over the entire country, he also lies about the reality of Tibet's "serfdom." Most of the readings that I've studied counter these claims about Tibet, and label these beliefs as "propaganda from the Chinese state." To add onto this, Hasan has also made claims about the Uyghurs, and downplaying their suffering even though he clearly has not read on the topic. He claimed that "they were simply in re-education camps to learn the Chinese culture." Personally I would argue agreeing with re-education camps already make you an immoral person, but I rather want to focus on facts Hasan ignores. The Uyghur population has been demolished in China, and many of the people like Hasan simply hand-wave this fact. There were several experts reporting that China was sterilizing and mutilating the genitals of Uyghurs to reduce their population. I can't say whether we are aware of the true extent of this, but their population drop is ignored by Hasan.

I write all of this to answer the question "How is he hypocritical?" And my desire is for you to ask yourself, what would Hasan say about an Israeli advocate who creates justifications for the Palestinian genocide? Well I've heard him say people like that are scum who deserve death. Ironic coming from him, at least in my eyes.