Right now the US under Trump is leading the diplomatic efforts toward Russia. I think Europe and the Ukraine would have been better served with European leaders doing this.
What deal can you make with someone who just doesn't stick to the deals they agree to?
Rolling red carpets for putin is actually undermining EU efforts to isolate Russia. Russian should be welcome only within their allies: Eritrea and North Korea.
Putin only understands the language of power. European countries don't want Ukraine to lose but can't commit themselves to the billions it would cost to win.