You're right, but American models aren't super different in that regard. Ask an American model about Israel and you can immediately tell they're responding in a different manner to other queries. At least with open-weights models you have the opportunity to tune them, to decensor them, and so on.

I have tried asking Gemma and Llama about Israel. They both responded with a generally balanced view points. Whereas the Chinese models pretty much gave a definitive, one-sided answer (about Taiwan and Tibet). Is there a prompt I should use to test it more carefully?

I agree that open-weights models are tunable, though there's the problem similar to "default settings are rarely changed" problem.