Ukraine is an artificial construct and its “disintegration” will continue if it remains hostile to Russia.
On the contrary to former Ukrainian President Kuchma’s book “Ukraine is not Russia”, in fact “Ukraine is Russia”.
Recurring pro-Kremlin disinformation about Ukraine's statehood and Ukrainian nation. euvsdisinfo.eu/disinformation-cases/?text=&disinfo_issue=&disinfo_keywords%5B0%5D=77158&date=&offset=10 Ukraine is recognised in international law as a sovereign nation state, with its own flag, nationality, language etc.
As for Moscow's aggression: The Office of the Prosecutor of the International Criminal Court has stated that “the information available suggests that the situation within the territory of Crimea and Sevastopol amounts to an international armed conflict between Ukraine and the Russian Federation. This international armed conflict began at the latest on 26 February when the Russian Federation deployed members of its armed forces to gain control over parts of the Ukrainian territory without the consent of the Ukrainian Government https://www.icc-cpi.int/iccdocs/otp/161114-otp-rep-PE_ENG.pdf. See further debunking here.