Many years ago, while I was working in an editorial office, a report arrived from Israel about the desecration of some Jewish graves outside Tel Aviv. Of course, it was called an anti-Semitic attack, and an accusing finger was predictably pointed at the local Palestinians. But without even reading the report, I casually remarked that the culprits were probably Jews.
On overhearing my comment, one of my fellow journalists exploded in anger, saying he had never, in his whole life, heard anything so stupid. I was a bit taken aback, but let the matter pass. After all, I had no evidence to support my suspicion.
I had almost forgotten about the incident when, the next day, the man came to my desk with a sheepish smile on his face, and said, "I guess I owe you an apology". A police investigation had revealed that the vandalism was, indeed, the work of some Jews, who had hoped to inflame anti-Palestinian sentiment.