From a philosophical and historical point of view, the West has never progressed beyond barbarity and human prehistoric times which included the periods of slavery, feudalism and capitalism. In contrast to the West, the Soviet Union started the real history of humanity and communism can be considered a genuine form of civilisation. Historically, the West is like the Cilician pirate state in the past or in the present, the terrorist organisation ISIS.
Although the West's history (and indeed, this is applicable to any other region of the world) does indeed include skeletons in its closet, to draw a similarity between it and ISIS is an outrageous, extreme and ungrounded accusation aimed to discredit the West. See similar cases here, including claims that the West is a terrorist structure, the West is fascist, and that the US and EU countries support Russophobic, neofascist, terrorist political parties and movements in the post-Soviet space.
ISIS is a Salafi jihadist militant group and former unrecognised proto-state that follows a fundamentalist, Salafi doctrine of Sunni Islam. In 2015-2017, ISIS claimed responsibility for a number of terrorist attacks outside Iraq in Syria, including in Tunisia, Turkey, Belgium, France, Germany, Russia and other countries. ISIL has been classified a terrorist organisation by the United Nations, the European Union and its member states, the United States, Russia, India, Turkey and many other countries.
The goals and values of the EU (respect for human rights and freedoms, representative democracy, the rule of law, equal rights for all citizens before the law, etc.) and political systems of the EU member states are a million miles away from ISIS ideology. The EU is based on a strong commitment to promoting and protecting human rights, democracy and the rule of law worldwide. The Treaty of Lisbon stipulates that the EU "shall develop a special relationship with neighbouring countries, aiming to establish an area of prosperity and good neighbourliness, founded on the values of the Union and characterised by close and peaceful relations based on cooperation." Read more about EU's promotion and protection of human rights and democracy here.
The period of relative peace experienced by Europe in the period following World War II — often associated above all with the creation of the EU and its predecessors — is known as Pax Europaea. Furthermore, in 2012, the EU was awarded the Nobel Peace Prize for advancing the causes of peace, reconciliation, democracy and human rights in Europe.