I don't think it's purposeful. I think it is similar to the "duper's delight" where conmen laugh when they are lying to your face because they get a high from lying and getting away with it. For jews, they get a high out of admitting that they are subverting countries because they believe that there isn't anything we can do about it. It's hubris. They just can't enjoy destroying things from the shadows if everyone doesn't know about it.

Now evangelicals, on the other hand... Those motherfuckers want to end the world. I am convinced that kickstarting armageddon is a bigger motivation for them than any bribe or blackmail ever could be.