There is a classic Orthodox saying: We know where the church is, not where it isn’t.
We also know that where there is Love, there is Christ.
As St Paul says, Christians might have all knowledge and truth, but with no love, it is pointless.
You could be born a Hindu or a Muslim, a Jehovah’s Witness or an Atheist - if you have Love, you really have Christ. All will be resurrected by Christ - every Jew, Agnostic, Buddhist, Sikh, you name it.
The will of Christ is written intuitively on every man’s heart. Love. Becoming Orthodox does not mean you have some golden ticket. It simply means having truth and therefore peace. But you can be the most devout Orthodox monk, saying all the prayers, chanting all the chants beautifully, doing all the services and wearing all the vestments - but if you have no love? What then?
Love is Christ. If you have love, you are Christian without even knowing.
And we don’t know people’s hearts. Only Christ does.