There are two reasons for something being said by multiple people:
It’s just people following people, and repeating what others said, which indeed is a trend.
It’s multiple people independently deriving the same conclusions from the facts on the ground.
If somebody is shot on the street in front of a crowd and dies, and 10 passerbys who saw it are interviewed and all say that “a person was murdered”, it’s not a trend, it’s them deriving the same conclusion from having observed what happenned.
Similary the people here having read again and again, from the government of Israel and Western “leaders” such as Sholz and Biden calling Israel “the Jewish Nation” and even accusing those critical of Israel and its actions of being anti-semite (i.e. of being “against Jews”, not of being against Israel) and then seeing news of somebody attacking a Jew whilst loudly criticising Israel, multiple people are all concluding from that base data that all those claims of Israel representing Jews are why some people really do believe Israel represents Jews, is simple logic: cause and consequence rather than a social mechanism like a “trend”.
It’s so simple logic, that confusing it with a meme is strange.
Beyond that, the tendency for people to actually go to the trouble of sharing with others that conclusion here now is probably driven by their outrage at the actions of Israel in recent times - very few people were pointing out the logic conclusion that “Israel claiming to represent Jews will lead others to actually believe it and hence blame Jews for any bad actions of Israel” back when the Israeli Genocide was slow burning and they weren’t murdering thousands of chidren a month.