the important thing is that the followers of the four Sunni madhabs are all united by the basic Sunni Aqeedah, their differences in fiqh can even be a mercy from Allah. the Shiahs vary from Zaydis (who are almost Sunni) to people like the Nusayri Alawites who are a long way from Islam. If Islam was a picnic the followers of the four madhabs would all be sitting on the same rug, with the Zaydis sitting nearby the twelvers would mostly be sitting half way across the park, but some of them like Sheikh Fadlallah Haeri would be nearer the Ismailis would be having their picnic in the car park out of their madness, only their ignorant laymen would even be in the park at all!