Why is it, when this topic comes up, so many people that are on the side that says human centric global warming is a fact; tend to use the argument that anyone who does not agree with them is a right-wing gun toting SUV driving mentally crippled slack jawed idiot?
Because it's patently obvious that humans are the cause of it. It's just an absurd proposition that there is any other significant cause of climate change. Yes, you would have to be some kind a slack-jawed right-wing gun toting idiot, or equivalent, to think otherwise.
You know all this mess in the gulf that people are hysterical about? Imagine 15,000 other deep water oil leaks of the same size spread out across the oceans, and what kind of hell that would be. Because that's the amount of oil we are burning each year. The idea that burning it all instead of letting it leak makes it all but harmless is madness. Less directly harmful that letting it leak, probably, but still plenty bad.
Just being uneducated wouldn't even be enough to explain it. Take a look at yourself for instance. You "haven't made a final decision yet"? Science doesn't make "final decisions". If new facts come up, scientists change the 'decision'; there is no 'final'. The evidence is so overwhelming right now that really the only way to deny it is to un-scientifically hold out for an absolute... well we can't be 100.0% sure so reserve judgment. Mathematics and religion works on absolutes, not science. So it's not even a question of education or intelligence, it's really a question of whether you have to courage to face the facts or not.
I think really the problem is that the scale of human activity is simply too great for many people to comprehend. People that haven't ever left their own town and aren't worldly just don't have the resources or motivation or fortitude to even contemplate it. So I don't hold out much hope for society to change before it's too late. And it's not too late, yet, but we'll need massive infrastructure changes or something drastic like say a solar shield to keep anything resembling our current climate.