[An example why the EU does not respect] territorial integrity: The unification of Germany. [Another example why the EU does not respect] territorial integrity: Europe recognized the collapse of the Soviet Union. That is, talking about territorial integrity, as it was understood in Helsinki, is out of the question. Europe destroyed Yugoslavia.
The principle of territorial integrity has always been one of the cornerstones of the EU's foreign policy. As for Germany, its unification was recognized not only by Europe, but also by Moscow. Read more: https://www.britannica.com/place/Germany/The-reunification-of-Germany Europe didn’t attempt to disintegrate the USSR – that occurred as a result of independent and actions of the leaders of the peoples inhabited this country. Read more: https://www.britannica.com/place/Russia/The-Gorbachev-era-perestroika-and-glasnost
Europe did not wage a war in Yugoslavia. The former Yugoslavia was a Socialist state created after German occupation in World War II and a bitter civil war. A federation of six republics, it brought together Serbs, Croats, Bosnian Muslims, Albanians, Slovenes and others under a comparatively relaxed communist regime. Tensions between these groups were successfully suppressed under the leadership of President Tito. After Tito's death in 1980, tensions re-emerged. Calls for more autonomy within Yugoslavia by nationalist groups led in 1991 to declarations of independence in Croatia and Slovenia. Read more about the devastating wars that followed and accompanied and facilitated the breakup of the Yugoslav state. http://www.bbc.com/news/world-europe-17632399