Unfortunately, that is not true.
So many political opinions are viable within any party IF you frame it correctly.
Somehow many anarchist/libertarians end up on the progressive/leftist portion of political because they are against corporation/banks/police/war.
Similarly, many anarchist/libertarians end up on the 'right' because they are against corporations/banks/police/war/government excess..
I'll give my own example.
I grew up in pretty conservative Islam. Now, as I grew up, I was still a Muslim. I could sit around and interpret the texts any which way I want and I could have a decent conversation and be a part of *most* Muslim communities. I didn't pray, didn't really believe in any of the rules, barely fasted... yet I was still by in large welcomed in *most* Islamic communities.
Eventually, I left Islam and would not be called a cultural Muslim or an ex-Muslim or whatever label you want. In practical things, I believe and act pretty much the same. Yet, by denying God and Mohamed was God's messenger/perfect man, suddenly I am shunned. I knew that going in. People suddenly stopped communicating.
The point I am making here, is that whatever practical issues I had with Islam, I could deliberate and discuss with people as long as I didn't threaten the Islamic identity and Islamic power. The moment I did, my opinion becomes meaningless.
The same is largely true of politics.
People think Climate Change is merely science. It is not. By admitting the 'science' you are automatically subscribing to a whole host of political initiatives from carbon taxes, road tolls, increased government spending...
But all that has nothing to do with the science. In some ideal world, climate change science could be independent of policy. But that is not the world we live in today.
How many scientists say we must act on global warming and have more taxes, more government spending...
Buying into climate change MEANS buying into the political policies of 'the other team'. Hence you are more likely to reject it the science.
The same is true again of religion. Evolution is pretty convincing. I know many Muslims who believe in Evolution as well. Some kind of God guided evolution :P But much better than the creation story.
In any case, however, if buying into evolution means rejecting god, siding with secularists... then they are likely to just ignore the science of evolution.
I'd be willing to wager that if the climate science was presented to republications without any stipulation of Big government / Left political action, most would not fight it.
And just to emphasize, there is no reason climate change should entail carbon taxes or anything of hte like. Those are all policy tools we choose. We could just as easily pay the oil companies extra money for them to deveolop green energy. We could just as easily reduce healthcare spending and entitlement spending, and use that money to build levies, green power....