How pissed would russia be if ukraine qualfied for the world cup
I don't think a country can piss nor understand why would a country urinate if Ukraine qualifies for the World Cup.
They'd be pissed. They might just invade
Hooligans would love it
Ukraine is (morally) part of Russia, so it would be like family reunion.
It is not players fault that East Ukraine is run by Fascists who oppress people, so there would be no bad blood.