Especially not when the topic is inflammatory and the discussion has managed to remain civil so far. Then it's vandalism, if not arson.
In my opinion, humans are inherently xenophobic and suspicious of anything that is unfamiliar or an outlier. Evolution shaped us this way. So you cannot eradicate all the pain, fear and suffering caused by xenophobia, not by a long shot. People with negative traits (in other people's eyes) need to learn to live with them, and they do it all the time. I am not by any means arguing for racism, of course. We still need to teach that racism is bad, but at the same time we should ask ourselves: are we blowing this thing out of proportions? If we as a society are already near the point of maximum tolerance, then insisting on further corrective measures (such as so called "affirmative action", i.e. discrimination to groups seen as the oppressors) may make things worse for everyone by raising resentment and heating up the hate as opposed to reducing it.