Imagine you woke up in your favorite television show/series and had to explain to the characters what was coming at the series finale to change the outcome.
That is the best way I can sum up how to approach Q. If they can't entertain the possibility Q speaks from a position of such knowledge, then all they need to think about is whether or not they believe most people to be good and why it is that good people so often fight each other.
https://youtu.be/mRMdfDvI7aQ
For those who can understand the reference.