A year later, a right wing dictatorship took over Greece(with the eventual support and blessing of the US). But at least Bill Clinton apologized about it when he visited Greece as the US President. Has Russia apologized for its crimes?

Thats the difference. You wont find many supporters of the american coups. Yet for the russian ones, some communists(ie tankies) feel the need to defend them. And unlike the american coup supporters who are right wing lunatics, the russian coup supporters claim they are communists. Both are just sticking to their team, ignoring the actual facts.