But you can't just presume that a particular image has one set meaning, even if it seems obvious.
Someone could use an old antisemitic Nazi poster as an avatar (wouldn't read very well, but there you go) and without asking them you wouldn't know whether they agreed or disagreed with the sentiments. They might very well be using to promote awareness of modern antisemitism, and even if they aren't, it might have that effect on most of the people who see it.
Arguably LN's showing up people's hypocrisy and questioning the faith we place in symbols. Entirely laudable as far as I'm concerned.
If I used this as my avatar, would it be acceptable or not: