There is a well-known Jewish joke that goes something like this:
A Jewish man and a Chinese man are in a bar. Suddenly, the Jewish man punches the Chinese man in the face.
“Ow! Why did you do that?” asks the Chinese man.
“That’s for Pearl Harbor,” says the Jewish man.
“But the Japanese bombed Pearl Harbor. I’m Chinese!” says the Chinese man.
“Chinese, Japanese, what’s the difference?” asks the Jewish man.
So the Chinese man punches the Jewish man.
“Ow! What’s that for?” asks the Jewish man.
“It’s for the Titanic,” says the Chinese man.
“What? That was an iceberg that brought down the Titanic!” says the Jewish man.
“Iceberg, Goldberg, what’s the difference?”
I am reminded of this joke when seeing this post by a new anti-Israel Irish group called West Cork 4 Falasteen, for an event they are holding with notorious antisemite Tony Greenstein:

(They have since deleted it and posted a new version, which corrects this embarrassing error).
So Goldstein, Greenstein, what’s the difference? He’s still just some useful tool they don’t give a crap about except as far as he is useful to them.
Remember, these people do not actually like Jews. We have seen it from other examples.
Although to be fair, they are pretty crap with the names of non-Jewish allies as well.
Hat tip: Teresa