Grace Outside the Orthodox Church

Dear Friends

There are some people (especially among the recent converts) in Latin America who have stated that there is no grace at all outside the Orthodox Church and that the other Churches, even those that preserved apparent mysteries are heretical, without grace and houses of damnation (to them there is no difference between a Copt or a Latin Christian and a Jehovah's Witness). They believe this to be infalible.

I sustain that this is the official position of the Old Calendarists but it is not the official position of the Orthodox Churches and that it's not their business to criticize and attack the official hierarchies because of this reason.

It's my understanding that in fact the Church does not have any "infalible" pronnouncement regarding the existance of grace in the mysteries of other Churches and that there are opinions in favour and other opinion against this idea, and that they cannot condemn others because of holding one opinion or another.

I always feel sad when I think of so many holy people who were raised in the Latin Church (that of the past) or the Coptic Church and when I attend their liturgies and see their beauty and devotion. I find hard to believe that the Lord would allow these people to remain without grace and be eternally damned.

I know that some theologians might agree with this, and teach that because of God's mercy, grace might exist in the mysteries of these Churches even though they separated and deviated from the faith because of their pride.

Is there bibliography about this? Or documents issued by official Churches about the mysteries of other Churches and the presence or lack of grace in them?

Thanks