It is well known. Read the 'House of Saud', or the countless books written by British writers & historians of the time. Also, look at who Abdul Wahab was, who started the Wahabism movement. He was not a religiously inspired man. Also, look up why Wahabism was created, & what effect it had on the Ottoman Empire at the time. These are well-established facts my friend.
Wahabism is a creation of the imperialists, & theologically, it is nothing but a distortion of the original Hanbali school of thought. Hanbali school of thought is one of the four school of thoughts in the Sunni sect. Another synonym for Wahabism is today's Salafism & Ahle-Hadis. Originally, Salafism was also different, but it became distorted into Wahabism. Today's Al-Qaeda group is associated with Wahabism.
Deobandism is ideologically & theologically a bit different from Wahabism/Salafism, but it has a lot of common aspects as well. I don't want to confuse you right now, but if you're interested, I'll let you know of their similarities and their differences. Deobandis are associated with the Taliban today. Deobandism comes from the Hanafi school of thought, the second school of thought out of four schools of thoughts in the Sunni sect. I believe Deobandism is a distortion of the original school of Hanafi thought, just like Wahabism is a distortion of the original school of Hanbali thought. Wahabism is in fact a purposeful distortion, as it is nothing like what the Hanbali school of thought ascribes to.