That's great advice - but it amounts to 'be careful and qualify your opinion to show you're _not_ racist'. That's exactly what people are complaining about.

The migrant detention issue has absolutely nothing to do with the topic of _legal_ immigration. Bringing it up does nothing other than to distract and prevent discussion on the original topic!

If we could just discuss issues _in good faith_ and stop with the name calling we might actually be able to solve some of them -- together.