I agree but do question the importance of a doctrine not mentioned in the bible and that wasn't formalized until well after the scriptures had been closed?
I have a cousin who mixes Far East religions and christianty and calls herself christian, she’s not.
Same issue with Masons. People who are Masons may call themselves Christians and faithfully show up every Sunday morning at (insert church name) then later head off to the Masonic lodge/temple. A person watching these Masons could become suspicious that they may have some doubts about Christ's sacrifice.
I don’t know anything about the other religions you mentioned. I know some about mormons from FR.
I personally consider anyone who believes in Christ's sacrifice to be a Christian. Beyond that, we get into categories of Christian such as those who believe in Christ's sacrifice AND try to live in accordance with scripture, etc, etc, etc.
Now HERE is a topic that should be on it's OWN thread!
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I'd be interested in how your 'personal considerations' were formed.
Upon WHAT do you base them?
Where did "they" get the idea of the Trinity if not from the Bible? All you have to do is read some of the writings of the "early church fathers" to see that their arguments for the divinity of Jesus Christ and the "triune" nature of Almighty God came from the Scriptures. Some good places to read about this subject are: