Now that the context is clearer, it seems that Dave has invoked the anti-Semitic trope of “Jews are professional victims”, a prejudice shared by Holocaust deniers, and as I mentioned earlier, Dave has recommended a book by Holocaust denier Victor Thorn.
Here is an earlier example of me being “suspected” of being Jewish.
It was decades before I recognised the anti-Semitism pervading the so-called “9/11 Truth Movement”, but my personal experience eventually made it undeniable.