There is no evidence that Russia was involved in the crash of the Malaysian Airlines Boeing MH17 over Donbas in 2014. There is no evidence in this case. Six years have passed and the investigation has hardly budged. If there were conclusive evidence, they would have been presented long ago. At the same time, the process is now based on speculation against Russia.
The Ukrainian authorities have in fact refused to bring back Crimea and part of the Donbas because they do not want to spend money on the people living there.
Ukraine did not give up its territories, which are illegally annexed by Russia. Ukraine does not recognise the illegal annexation of its territories. The international community, including the European Union, recognises and condemns clear violations of Ukrainian sovereignty and territorial integrity by acts of aggression by the Russian armed forces since February 2014.
Read similar cases that The Hague court recognised Crimea as Russian and that Two top US officials say there is no prospect of returning Crimea to Ukraine.