I am a Marxist in China
Orthodox Marxists in the Chinese internet community often view Russia and Iran as weak links in imperialism, rather than as anti-imperialist forces .However, in the view of Chinese Marxists, opposing the global hegemony of the United States takes precedence over opposing secondary imperialisms (Iran, Russia).
The person in the picture is Yang Heping, a US citizen with a Chinese green card, and he is the most popular orthodox Marxist-Leninist-Maoist self-media figure on the Chinese internet (with 3 million followers on Tiktok and 800,000 on Bilibili). Yang Heping advocates that whether it's Ukraine, Russia, or Iran, "the truth is on the side of the proletariat, not on the side of any government or capitalist."
In China, those who unconditionally support Iran and Russia are usually nationalists or national leftists.
I wonder if the differences between the left-wing in Europe and America and the left-wing in China are really that significant?
Others are going to give answers founded in theory as applied to the geopolitical situation better than I could. There are also emotional reasons I am inclined favorably toward enemies of the US. I hate it here. I hate here. We are ruled by mad child molesting aristocrats. All institutions were designed by scammers and robber barons to be as exhausting, expensive, and minimally helpful as possible. Most people are bigots of at least one kind. No doubt the same things are wrong in many other places but familiarity breeds contempt and I live here. I can't help but feel gratified when anyone bloodies uncle Sam's nose.
I completely understand this reason.