I would steer a child away from any source which overtly promulgates a political agenda, especially an extreme one.
Of course they will not be objective.

Help them find neutral sites, or help them find books appropriate to their age.

I too would steer them away from any deranged person who disputes " that war is a senseless waste of human life" but I have never come across such nonsense in all my reading.
Have you? If not why pretend it is an issue?