Man, That example about Christian arabs is to show you that you don't understand arabic that's why you don't qualify to talk about the so called contradictions. Of course Christian Arabs reject Islam because they believe Jesus died on the cross. Besides, I have fully answered you, you just choose to ignore the answers.
According to 2:116, it is blasphemy to say that Allah begot a son. If that were true, He shold have had a wife (6:101), and His son would have been of the same kind as Himself; whereas Allah Almighty is One, with no one else like unto Him (112:4). Begetting is an animal act which goes with sex. How can it be consistent with our conception of One who is above all Creatures? If such a blasphemous thought were possible, as that Allah wanted some one else to help Him, He could have chosen the best of His creatures instead of lowering Himself to an animal act. But glory to Allah !. He is above such things !. His Unity is the first thing that we have to learn about Him. As He is Omnipotent, He requires no creatures to help Him or bring other creatures to Him.