oh grief Im gonna get slated for this, but this is what I think of what the OP experienced on the other thread.
Here goes. I think that she is not racist and asked a genuine question. I equally think that this is not the forum to ask such a question though, as it is a very sensitive issue. I think, that as in all things, when presented with something new or alien or out of ones experience - then one can be 'taken aback'.
I think - that this is what has happened, that the Op was 'taken aback'.
So. Should she have been? In light of her opening a thread and pouring out her concerns so publicly, I think that we should be more supportive and guiding towards her.
My advice to her, would be: the colour of ones skin should not pose a problem to you. We are all human regardless of colour, race or religion. You should have dealt with your concerns in private, as your thread did come across as racist - but no doubt you did not mean it to. Go make a coffee, take a time to sit and think. Each child in that class is a special child - with beautiful coffee colour skin, or dark brown skin, or white skin. Each child starting a journey in this world - looking to be accepted, learning to love, learning to play and make friends....etc
Think about it. Its a beautiful mix of beautiful children - and each one able to offer something different to another. There is no need for concern. Take care
And so, should MN delete such a thread. No I dont. Because we can learn from it. We can learn and see what the response was, we can learn and see that someone has genuine struggles out there and needs help. We can also see that there is still a divide in race, religion and skin tone. And thats a shame, but times change and people change. We need to encourage people to see what is right, not just slam them at the first hurdle.
All this of course, is imho.