"Why were they masked?"
They may figure that they can hide their identity from the "God of all flesh" (who is not Orthodox).
Jhn 3:19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.
While this action is wrong period, the comments here show your so called Christian hearts to be just as black and sinful but a lot more self-righteous. Christians in deed.
What a terrible remark!!
You ought to apologise to ALL those you offended. I know, that YOU as a Christian realize that.