Putin accuses EU of Ukraine ‘blackmail’ Ukraine over pact

This isn't hypocritical, it is delusional.

Is British the most nationalistic european culture?

Close enough, but no. In 2009 Pew survey 7% of British identified themselves as Europeans, while only 4% of Russians and Hungarians (glorious mongoloid race).

Russia looks today as the definition of nationalistic society. It's big country and in effect more visible. In this survey Bulgarians and Hungarians more often than Russians agree that “there are parts of neighboring countries that really belong to us”, while there is higher percentage of Italians unfavorable towards muslims than Russians.

The opinions could have changed since then and this is incomplete. Serbia may has the most nationalistic culture.