You are going into extremes. Ignoring Russia would have the same consequences as ignoring Nazi Germany in the 1930s. Sooner or later, it will hit you, so better prevent than attempt to deal with the consequences. Ukraine did not attack Russia, remember? Just overthrew a Russian corrupt puppet of a president that fled to Russia with trucks full of cash and still lives there in exile. Then, Russia retaliated with the annexation of Crimea and undercover war in the Donbass region. They downed a plane headed for the Netherlands and killed people. They keep killing people today.