"The campaigns with the biggest apparent international reach were under the name of an organisation called Chance Letikva (Chance for Hope, in English) - registered in Israel and the US." Chance Letikva is registered with the US IRS as a charity. They've filed a Form 990. Location is Brooklyn, NY. [1] Address is listed. It's a small house. It's also incorporated as CHANCE LETIKVA, INC. in New York State. Address matc…
Most of us don’t have the tools or the time to do it properly, at least on here; and that can end badly [0]. It rarely achieves a thoughtful considered outcome, and there are other places to do that kind of thing if you want to—some of those communities, like Bellingcat, seem pretty well-practiced in their methodologies, and their findings seem to have accordingly high impact.
[0] e.g. https://www.bbc.com/news/technology-22214511 … and https://en.wikipedia.org/wiki/Suicide_of_Sunil_Tripathi