When France, Germany, Russia, Austria and maybe possible the Ottoman empire fight a war its defiantly not in any way 'local'. I really don't understand how peo

When France, Germany, Russia, Austria and maybe possible the Ottoman empire fight a war its defiantly not in any way 'local'. I really don't understand how people can blame Britain for join a war to enforce a treaty that Germany had was a signatory to, and had broken. That seem like evaluation the two power with different moral standards. Britain tried everything in their power to bring people to peace talks, these peace talks were blocked by Germany and Austria. Then Germany is the first to violate borders and Britain eventually joins the war because they had a treaty and because the Germans behaved like animals in Belgium. How can anybody make the argument Britain is at fault here?