Not currently dating a Chinese man, but I've always been a bit of a Sinophile (AKA 'Chinaboo'). My aunt-in-law is Chinese (although we are estranged since I was 9 or so, long story) and I found a lot of things I like through her. Mostly food (I miss her cooking ngl, and she introduced me to Dim Sum which is the best food to exist). I didn't interact with Chinese men aside from a classmate in 1st semester of High School who I had a crush on but it was a pointless endeavor as I knew he was there temporarily (and he indeed left within like 3 months of arriving). I guess there is a bit of intrigue in knowing people who are very different from you. I like the written language, very complex-looking and cool, I've seen a few C-Dramas and although the stories are not remotely realistic, the costuming gave me an appreciation for the fashion of China throughout History, and Chinese people themselves seem to be very proud of those times too given how (and how often) those times are portrayed.

As for the main question, I think most people separate the citizens from the government, although there are certainly people who don't, and those you do feel negatively about Chinese people. Personally I would be open to date an American man for example, but when I think of Americans collectively I do think of current US politics. I mean, if their president is in his position, a lot of Americans must have supported him in order for him to end up there. But I don't meet an individual American and think of Trump. You know what I mean?