The root? A thousand years of Christian-Muslim violence.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;First_Crusade" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;First_Crusade</a><p>End it by replacing guns with first aid and tanks with schools. End it by replacing violence with empathy, by replacing fear with love.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Swords_to_ploughshares" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Swords_to_ploughshares</a>