"I am looking for proof that it is man made and stoppable."

"Proof" is something that happens in math! What we have is strong evidence and data that suggest the problem is real! It is not 'arrogant' to try to get that strong evidence out in as clear a manner as possible. It would be reprehensible to see a potential problem of that magnitude and NOT warn people!
Al Gore didn't invent this situation.He read data from concerned scientists and used his own bully pulpit to spread the word. Al Gore has being reading, writing and studying environmental issues for 20 years or more. I listened to an audio book by him 16 years ago, when I barely knew who who Al Gore was, and was strongly impressed by his thorough treatment of the issues.

You, Sawzaw, are being shallow & dense in your refusal to see the relevance of the data in proper context!