Do you have reading comprehension issues? He doesn't deny it happened in that comment, he calls it a US-backed color revolution and says that the PRC was right to put it down.
Calling the entire protest a color revolution is a matter of opinion, but it is an undeniable fact that many of the most high-profile protest leaders were US-backed.
Nobody is denying that the Soviet Famine happened, what they deny is the totally fabricated claim that it was a targeted genocide against Ukrainians.
Nobody is denying that there was/is a police crackdown, what they deny is the totally fabricated claim that it is a targeted genocide against Uyghurs.