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09:47
You can read the comments to this meta thread for some clues: https://politics.meta.stackexchange.com/q/6946/17614

He seems to be a bit of a character. There is a link to another meta thread where he himself wants to ban the term "historical Palestine" which he considers anti-semitic.
10:32
@ТymaGaidash ctrl+z would probably have worked immediately after.
 
3 hours later…
13:50
@C.E. ctrl+z was clicked many times after about a few seconds, but it did not help either.

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