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