The USSR was not Orthodox nor was Orthodox tolerated. Meanwhile the Pope once praised Hitler and Catholic priests helped Nazis escape to South America - and in South America another generation of Catholic clergy advocated "Liberation Theology". Even under Soviet captivity and undermining of the Orthodox faith no Russian celrgy advocated spreading Communist revolution.
But the Russian Orthodox Church was not abolished & outlawed as was the Ukrainian Orthodox & Ukrainian Catholic Churches.
In fact, is it not true that the Russian Orthodox Church was the only one to fuction legally in the USSR?
And was this attempt to obliterate rival Eastern Churches done so with the supportive role of the partriarch of Moscow(Aleksei)?
Is it also not true that the Russian Orthodox Church was the recipent of confiscated Catholic churches and to this day not all churches & properties have been returned to their rightful owners?
Interesting standard of toleration you have.