Disagreeing To Disagree

SO MY CULT LEADER friend told me that there are many intelligent species in the galaxy genetically related to us, i said how do you know he said there are many ways of knowing i said no, there is only one way, the scientific method. Then another friend, jumping in to help the cult leader, said scientists do not always agree and i said they never agree, at first, which is why science works, and he said, Ok, whatever.... Wouldn't you, once and a while, like to be able to engage someone in this country in a little intelligent conversation, make a few good points, and have them accepted for what they are? The more we embrace of our opponents arguments, the larger we draw our circle. One need not always disagree for the sake of disagreement. Has anyone ever told you that a single volcanic eruption anywhere on Earth spews more pollution into the atmosphere than all human activity ever enacted? Don't believe it, its a lie. And how about the one wherein some brilliant American says that the weather is constantly changing, climate change is constant, and natural, and therefore human activity has nothing to do with it. Isn't that one beautiful?