While I agree that we shouldn't alienate people with elitism, I think k this is a fair criticism.

Basic biology has the connotation that it's something everyone should know and grasp.

The reality is that basic biology is simplified, not factual. That should be pointed out. The educated or intelligent ones, should understand the distinction, even if they disagree. The uneducated can either switch off or be educated.

Allowing misinformation to proliferate is a bigger problem, in my view, than alienating people that don't want to listen or learn.