Are Jews behind all the wars?

No. That would be a tad difficult as the Jewish nation did not exist for some of them. It would be hard to explain that with the internal Inca wars for instance. Your knowledge of history seems to have some blanks in it.

Answer:

The question seems to imply that 'the Jews' have supernatural powers, and a moment's thought should make it clear that the notion is a conspiracy theory. It is widely associated with a grotesque, wildly gesticulating, screaming and shouting, ranting and raving little megalomaniac with a moustache (Hitler).