Yes, sure. It seems hypocritical to me to say, on the one hand, that there is no political difference between the yankies bombing Yemeni children directly, vs giving the Saudis the bombs to drop, and then on the other hand, say that there is a difference between China supporting fascists who murder children (i.e. Israel or the Apartheid goverment), vs actually murdering those people themselves. I'm not saying that you are defending this, but it strikes me as a weird mental gymnastic were some 'tankies' (or whatever term you want to use, no normative judgement intended) will engage in basically some classic liberalism in order to let China off the hook on this front.
We should also mention the Khymer Rouge. Fascist might not be the correct term here, but it was politically equivalent in terms of how destructive, bloody and reactionary it was.
Israel is fascist. There is no excuse, by the nature of fascism, for supporting it. Ever. Yet China is happy to fund both the Israeli army and the West Bank administration.
Again, people can't have their cake and eat it too. You can't both say (i) profoundly reactionary as Russia is, Ukraine is more deeply fascicized and that as an immediate consequence of that, there should be a preference for the war ending on Russia's terms; and (ii) that China may be funding fascists, but this is understandable and justifiable in the context. Okay. So then what are the criteria and conditions here apart from biased vibes to decide when critical support in these extreme cases is justified or not? What's the line? I know I have my own ideas about this, but it's often difficult to see what other peoples' are.
It's should go without saying that China's foreign policy, including during the Maoist period, has been by far one of its most reactionary aspects. Once again, the Sino-Soviet split was a historical tragedy and reflects the challenge for communists of avoiding finding themselves in post-revolutionary situations in which their politics becomes nationalist due to them coming to identify their interests with those of the traditional nation state as a matter of reality and pragmatic necessity.
Explanation isn't the same as justification.