The fact is that Ukrainians wanted a better life and that the success of new member EU states pointed to this being possible and was motivation to aspire for something more. The simple facts are that salaries are higher and life in the EU seems to be governed by the rule of law and not subject to the chronic corruption found in some countries in Eastern Europe.
As an independent and sovereign country, Ukrainians staged an Orange Revolution in 2004 that was meant to drive out corruption but sadly that failed much to the frustration of the Ukrainian people. Corruption in fact got worse under Yanukovych and by the end of 2013 Ukrainians were fed-up. Given that they couldn't trust their own politicians to reform the country many felt that closer relations with the EU could help to assure that desired reforms were carried out and that the Ukraine could then become a stronger and more competitive nation..
I am not denying that ultra-nationalists participated in the revolt, however they were a minority of the participants at Euromaidan in Kiev. Russian propaganda found advantage in crafting the story that it was a "Nazi" uprising and went back to the history books to prove that some Ukrainians had even sided with the Nazis during WWII (Bandera), to give credence to the Russian claims.
The nationalist party you seem to feel is controlling the Ukraine is called Svoboda. The fact is that these nationalists received
less than five (5) percent of the vote in the last parliamentary elections in 2014:
"In the late October 2014 Ukrainian parliamentary election the party won constituency 6 seats; the party came 0,29% short to overcome the 5% threshold to win seats on the nationwide list.[12] The parties election results thus halved compared with the 2012 election because of negative assessments of the activities of the local governments that included Svoboda members."
In Svoboda's supposed stronghold it didn't win anything:
"In its former stronghold Lviv Oblast Svoboda won no constituencies."
Svoboda political party - Wikipedia the free encyclopedia
France's National Front nationalist party today receives
over twenty (20) percent of the vote in local and national elections.
Germany's Alternative for Germany (AfD) is getting
over ten (10) percent of the vote and has even won seats in the European Parliament.
If you are worried about the Nazis coming to power you can look a lot closer to home.
I have to wonder if you are East German. There are some that miss the drab, dark days of the Soviet Union but the vast majority wouldn't go back if given the choice.
.