You said...
I don't like Chinese.
The Irish aren't really that smart.
I'm not hiring any black guy.
You Welsh can hardly string a sentence together
The first one isn't "the Chinese" or "Chinese people" so one would only use that phrasing when talking about a thing that is Chinese, not a Chinese person.
You didn't say "they aren't playing smart" nor did you say that the team isn't smart. You said the Irish aren't smart and therefore made a negative generalization about an entire group of people.
No then. It doesn't express any racist belief. It's a statement about hiring....which could be based on a racist belief, or not, but by itself....no, not racist.
You didn't say "we Welsh" you said "you welsh"....which necessarily excludes you from the group of Welsh. Even if it didn't, I see no reason why you couldn't hold racist beliefs about your own race.
The funny thing is my claim was that you can identify a racist statement apart from context. Your attempt to disprove this required....context. How does adding a context later disprove my claim? Of course you can identify a racist statement in context....but you can also do it without any context.
Great. We agree on your definition of racism. That's what most people mean, that's how nearly everyone uses it.