This is very dependent on the type idea you have, rather than the fact that it may be non mainstream.

That's incorrect. Scientific and neutral ideas that do not fit the mold cannot be safely discussed

Highly amused at how you have illustrated the bovine predictability of the HN hivemind. The HN crowd smugly pats itself on the back as being smarter and more enlightened than the average bear, yet in practice is tremendously narrow minded and hateful of anything that goes against its prevailing norms. The diversity agenda apparently does not include diversity of thought.

There is no "HN crowd" in that sense. This is a common illusion, known as the Hostile Media Effect:

https://en.wikipedia.org/wiki/Hostile_media_effect

https://hn.algolia.com/?query=%22hostile%20media%20effect%22...

People with opposite views have opposite images of the "HN crowd". Since these images are determined by your/their own views, they don't contain any information about HN.

And so you prove my point yet even a step removed - to even mention that mentioning that a collective narrowmindedness might exist incurs criticism, is not permitted.