I guess I wouldn't define a silent perspective, whether majority or minority, as present in the conversation.
It is one phenomenon when everyone agrees. Probably everyone is right. When everyone who speaks agrees, and everyone who doesn't agree doesn't speak, that's quite a different pattern.
As I noted above, I agree: I think the problem is the tone. In combination with this pattern, of course.
(I should have just noted that it seems possible that the reason American parents find their children less safe in public is that they're right. Parents are worried about assaults and kidnapping. I couldn't find statistics on child assault and/or kidnapping, but the Japanese rape rate is roughly 27x (not 27%) lower than the American [1]. Given this fact, it's not immediately obvious why one should search for an additional cause of the disparity.)
Wherever our moderator is from, his perspective is an American perspective. This is an objective factual statement, like the fact that English is an Indo-European language. Probably in the same geographic region 100 years ago, there was a living pre-American intellectual tradition. But it hasn't existed since 1945 at the latest.
(The most concentrated remaining geographic locus of pre-American ideology is -- by no coincidence -- the subject of this article. Nippon Kaigi anyone? But I don't believe Dan is Japanese. And even Japan isn't exactly what it once was.)
[1] http://www.nationmaster.com/country-info/compare/Japan/Unite...
[2] https://en.wikipedia.org/wiki/Nippon_Kaigi