What? That made no sense what so ever. How is the metaphysical, "anti-existence?"

Although, I understand what you're getting at, but really BAD choice of words. Throw away the "anti-existence" and just leave it as metaphysical. For, in many ways, that is what science and philosophy has been theorizing these days. Physical matter is finite (it can be "anti-existent")...the metaphysical, on the other hand, well, perhaps it's infinite (existent).