I've only met one Russian immigrant who felt comfortable talking about Russian people, and they definitely said something like this, among other things.
their real history is one of slavery and subjugation under the Mongols
And this shouldn't even be a big deal. What group of people haven't been subjugated at some point in their history? Collectively, I suspect that nearly all peoples have been. Certainly it is a bigger conversation with modern, more recent slavery, involving forced migration, but it doesn't change what happened either. The US and some European countries face this topic (as the subjugators) and are talking about it with varying degrees of honesty.
There is a phone by unihertz but their phones tend to run dated OSes. I have had good lick with what @TheBest said. People either break phones, or don't, it seems.
I don't do the kind of writing that would require any formal format, but a teacher in college seemed to feel that MLA was meant to be used strictly in an academic setting. I'm not sure what I was told to use in high school, but in college all the writing classes wanted us to use a format relevant to our major. I believe I used APA but it has been awhile. Could have been MLA.
What all is involved on moderating? I haven't gotten involved in any of that, I come from a bulletin board back ground, not reddit, but I am sure I am not the only person without a relevant background who is willing to be helpful in some capacity. It will just all be new. But it seems like having a warm body to delete posts could help a lot!
I don't have anything to add but appreciate you beginning the discussion. It seems that all instances will periodically face this issue; perhaps it would be good to have a proactive plan on place for when it becomes relentless.
You can report a post. It will even tell you if it has already been reported. I do not know who receives this report. I report and then block this type of thing.