You seem to have a fundamental misunderstanding of how the debate works. We're not talking about two rational individuals forming a debate in good faith where they're able to change each other's opinion.

We're talking about people latching themselves to an anti-empirical evidence, anti-scientific approach to things such as climate change or vaccinations. The debate becomes political when there's enough people and policymakers believing in something, scientific process be damned, to actively affect law.

The debate about vaccinations causing autism for example is a absolutely political one, enough that we see people eschewing scientific fact in a way that endangers large portions of our society. Yet when we talk about an environment needing to be politically neutral, then their opinion must be treated with equal weight. We've seen this occur with people who are anti-evolution as well, where they demand their opinions be taken seriously and allowed into the greater debate. And it shows with our current society.