Someone who does not believe in participating in war is known as a Pacifist. They believe that war and violence are unjustifiable and that disputes between nations can and should be settled peacefully.
non-sexual
patrioctic.
A anti-social
a treekiller or just plain stupid
frugal miserly stingy skimpy parsimonious
A liberal.
A person who hates all foreigners is typically referred to as a xenophobe.
A person who hates conflict is often referred to as conflict-averse or peace-loving.
non-sexual
A misanthrope
an introvert
Maybe a 'homebody'.
misanthrope
Xenophobic
patrioctic.
It is called 'pacifism'
A anti-social