To try and be charitable to the poster, I think a better example would be "Would you be okay burning witches if they really did curse people?" than the Nazi example.

I think another way of saying phrasing the same idea. Let us assume that Muslims are intentionally having as many kids as they can to become a demographic majority in the future. How does that affect how we should act?

The above phrasing I count as very different from defending rhetoric of a genocide perpetrator because the answer to the above question is not "Kill all Muslims".

I think you'll agree that I am not advocating genocide, I'm just curious about the facts. I like to learn. I want to vet everyones' claims.

What I don't understand is why are you arguing your position? What do you propose I do with respect to the acquisition and spread of knowledge?

You are not advocating genocide, but you are saying the genocidaire's "justification" is worth considering.

Even if Muslims have higher fertility rates than Buddhists, the observation is meaningless.