The US government gave spoken promise to Gorbachev that NATO will not expand further to the East. There are Nazis in power in Ukraine. There is a civil war in Ukraine, no Russian military involvement.
A group of people started bombing Yugoslavia violating all norms of international law.
In 1999, the NATO operation for Kosovo followed over a year of intense efforts by the UN and the Contact Group, of which Russia was a member, to bring about a peaceful solution. The UN Security Council on several occasions branded the ethnic cleansing in Kosovo and the mounting number of refugees driven from their homes as a threat to international peace and security. NATO's Operation Allied Force was launched to prevent the large-scale and sustained violations of human rights and the killing of civilians: bit.ly/2a0UmfI,