When someone says "murdering people is OK" and then doesn't murder - nobody is going to accuse him of hypocrisy ;)
Even if there's no consensus on whether some beliefs are good or bad, such as in politics, doesn't hypocrisy show some sort of "character flaw" in the perpetrator? It's dishonest to push views you don't hold yourself, or rules you don't even try to live by.
Regarding showing dishonesty - yes, but "supporters of X are dishonest" is "ad personam" - that's poor argument.
Better to use hypocrisy to show "even supporters of X don't really believe their view is right, so it probably isn't".
Still, not a good argument.
Their view could be right, whether they do really believe it or not.
E.g a politician could say "don't steal", and he could be stealing himself. That he is hypocritical about it, doesn't mean stealing is "probably" right.
Sorry, it's a horrible and non-factual joke. But your theory is still wrong. There is consensus in society that racism is bad and racist with friends of other race is a classical example of hypocrisy. And if by lack of consensus you mean existence of other view then murdering example is wrong because it suppose lack of consensus and your theory is tautology.
EDIT: eh, I've read your post again and I'm wrong, you're right, it's the same situation.
But is racist with with friends of other races really classical example of hypocrisy? I hadn't encountered it (but I live in monocultural country).
He probably means the classic "I'm not racist, I have black friends and all, but blacks in general do [this and that]".
Which is often considered a classic example of hypocrisy but I don't think it is. In a lot of cases it's not even racism.
E.g a guy could have Mexican friends (in the US or Mexico) but be against mexican illegal immigrants.
This is often taken to mean he is racist, but in actuality he is against illegal immigration, not against a race in general (he might consider that low end jobs are numbered, or that wages in those jobs are getting lower due to increased competition from illegal immigrants, or that lots of hungry, unemployed opportunity seekers from Mexico could resort to crime to feed themselves etc).