There's more nuance to this subject than you're implying. It is not the case that either we can't make any reference to race/ethnicity or else Lemmings don't care about racism. Making reference to race or cultural insignia doesn't automatically make something racist.
In other words, there is a middle ground here. Blackface is an obviously hurtful representation of black people that harkens back to when white people saw them as inferior. On the other hand, many middle eastern men wear this particular head covering and there is nothing hateful about it's inclusion into the picture.
But the problem is using the whole ethnicity's cultural wear on a meme about a group of people being bad or evil makes people associate all middle eastern people as bad people.
It's just something our brain does, and that's why it's best not to do it in the first place. I'm sure a lot of people have terrible opinions about certain minorities because their friend or their aunt told them about how one person from that race treated them poorly. People always extrapolate that across the whole race.
See, I agree as well that the government in the post is absolutely awful. But just looking at the picture, it just seems to look like a rather insulting caricature of middle eastern people; even if that was something you didn't do intentionally
Wow, I'm amazed that you're having to explain this to people?! I thought we knew this already?? Good on you for taking the time to patiently explain it so clearly for those that somehow missed that memo! Legend! :-)