Facebook removed the US Declaration of Independence for violating hate speech

Except that it wasn't. Or, if you want to use that language, the Allies were merciless savages who firebombed cities full of German civilians - "undistinguished destruction of all ages, sexes and conditions" - and the US forces were merciless savages who carpet bombed Vietnam, Laos and Cambodia.

Remember, by 1776 there had been 150 years of interaction between those "merciless Indian savages" and the English colonists (to say nothing of the French and Spanish colonists who had a different experience). We know it's wrong to make the blanket statement that the Native Americans were merciless - because they did show mercy.

English colonists learned combat skills from their Native American allies, rather than the military formations of European combat. (Eg, Benjamin Church in the early 1700s). How did did the English have local allies if the Native Americans were merciless?

Finally, and I'll quote from https://en.wikipedia.org/wiki/Scalping#Intertribal_warfare :

> More recently, historian Roxanne Dunbar-Ortiz contends that, in reality, Ulster Scots settlers, who were experienced in scalping as foot soldiers in the British occupation of Northern Ireland, introduced the practice of scalping to the Americas.[15] She points out that the practice of scalping is one example of how acts of brutality were and are attributed to inaccurate degrees to Indigenous peoples, while the usually greater violence of dominant settler-colonial groups is suppressed through various means. The imagined greater brutality of groups settler-colonial nations were and are exterminating, ethnically cleansing, dispossessing and looting was thus used as one rationale for these settler-colonial undertakings.

So, how do you know that "merciless Indian savages" is an accurate description, and not a piece of propaganda to justify continued warfare and colonial expansion?

Because what I've read of history, it's much more the latter.

Ignoring that point, Facebook has the right to censor its own platform and, like any human organization, is going to screw it up, sometimes laughably badly.

And in whatever period of time you consider, those who get to define it are the ones you least want to do this job.

In this case it seems it was the job of some algorithm. Good luck when that algorithm (or person) gets to decide your fate besides telling you what (not) to say!