It's hearsay ("a lot of friends reported") and
if they are removing posts/comments en masse, it appears to be explainable by anti-terrorism-guidelines, because the groups praised (in what you translated) are considered terrorist groups or affiliate with terrorists in the US/West.
There might be something there that is worth looking into, but in the current form, it's not really obvious. HN isn't really meant for outrage, "raising awareness" etc, especially when it's mostly unsubstantiated rumors; use Twitter or Reddit for that.
Analyze it thoroughly, write an article, take other explanations into consideration and explain why & how you ruled them out, and post that as a SHOW HN.