Take it easy. Put it on yourself first. Show some false/true empathy that you were the same way before you discovered XYZ.
It's our jobs- we as the ones bearing truth and the knowledge must wake them.
Show, don't tell.
I have evidence that 2+2 doesn't equal 4."
And here's why.
Present undeniable facts.
Clear and Concise.
Q proofs can help unlock one's mind to the step of simple curiosity.
But before anything, they must be willing to listen.