Blessed if I know.
On the one hand, the OP probably doesn't deserve to get her thread pulled.
And I guess the comments are challenged.
On the other, the comments are still standing and by still standing, there is a chance that it reads as endorsement of those comments.
I don't like to think of adding/contributing to a climate of hatred against travellers. I'm not averse to censorship, myself. But the general leaning of mn is towards openness and debate.
So, two minds.
Hando - The arguments in favour of having it pulled are many and various.
One argument against; we never operate in a completely censorship-free environment; there is always a premiss about what is completely unacceptable. So, if you have certain comments in a public space, even debating them, they are, at least, partially acceptable.
Even debating whether something is acceptable or not allows it to the edge of the "possibly-acceptable", rather than "strictly-unacceptable".
So, for example, if there was a BBC debate, chaired by David Dimbleby, seriously discussing the proposition "Cherryblossoms should be allowed to ritually sacrifice her children", it would be moving that proposition to the edge of the "possibly-acceptable". When, in fact, it is wholly unacceptable.