Yep, they were the ones who thought He was speaking literally and since they were Jews knew that eating human flesh and drinking blood were forbidden by God. Catholics on the other hand have no compunctions about not obeying God’s commands.
So, you are saying that the ones who left are what?
The Apostles thought the same thing, yet they stayed. So, that makes them what? Catholics?
Jesus said, “Will you also leave?” He does not try to mitigate the saying. He does not try to explain it even though there are other times He does explain Himself to them.