Ever read John 3:16
God so loved the world that. Note that God love the world, that isn't the physical lump of rock that makes up the planet earth, but every living soul who has, is and will live on this planet. God loves them.
There are people around the world bearing the label ' Christian ' who suffer because of that label.
They come from every branch and sect of Christianity and they are your brothers and sisters.
It is not our role to query what they believe, but it is our role to pray for them, to donate to aid agencies etc.
When one meets and talks with other ' Christians ' then one can be picky about what the believe.
Pray for your brothers in the orthodox, nestorian, Catholic, Methodist, Anglican etc etc churches many suffer as a Christian with no personal saviour.