The mass murder of 7 million Ukrainians in Stalins engineered terror famine of 1933 is a major reason for the anti Russian sentiment in Ukraine. Here. Educate yourself by watching this award winning documentary.
https://www.youtube.com/watch?v=PsM3YoPiloE
Also check out the movie “Mr Jones” about a courageous reporter from Wales who got into off limits Ukraine and later reported what was happening but was denounced by Stalins lacky, Walter Durranty, who worked for the NY Times in Moscow and later won a Pulitzer Prize for his “reporting” where he denied the famine existed covered up this Holocaust.
Putin is a Stalin Wannabee but he is millions behind in his murders. Thankfully, Ukraine this time is getting outside support.