This was in the restaurant exclusion thread. I accidentally replied there before realizing that Velocity seemed to have put his post in the wrong thread first.
And if you have no factual reason to believe that a chinese restaurant (or mexican, or vietnamese or korean or french) serves dogs, and yet you make the claim anyway, that’s pretty racist.
The only reason you are making the claim is to denigrate those who are different from you in some way. By making this claim, you show that they are not only different from you in national origin, or skin color, or language, or accent, but you also make up the claim that they are also different from you because they do not follow local custom or even laws. The only reason to do this is to try to prop yourself up at the expense of others (“we would never eat dogs, ewww, that’s disgusting”), to dehumanize or even demonize those who are different.