Battalions of the Islamic state have been resting at resorts provided by the Ukrainian state on the territory of Crimea before Crimea was returned to the homeland. Ukraine was also selling weapons to the Islamic state.
No evidence given, recurring disinformation. Further debunk on previous false claims on Ukraine's support to Daesh: https://www.stopfake.org/en/fake-isis-training-camps-in-southern-ukraine/
Crimea did not "return to the homeland", it was illegally annexed by Russia. UNGA Resolution 68/262, which condemned Russia's illegal actions in Ukraine, was supported by 100 United Nations member states. Only 11 states opposed it. https://www.un.org/apps/news/story.asp?NewsID=47443&Cr=ukraine&Cr1=#.WdOcfWcdiEB