There’s no “pro-war” faction to speak of, no notable prowar leader, no faction to follow him or her if there was one.
Just a myth propagated by people who want to sell books and take donations and who want to energize an audience on late late FM radio.
Of course, there’s no formal pro-war group or leader that explicitly advocates war. Nobody is that stupid.
Just like there’s no explicitly pro abortion groups or leaders - they call themselves “pro choice”.
But you knew that.