The biblical answer to the question is in 1 John:
Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God
And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
This was pretty much confirmed by Jesus when He asked Peter who he said He was... to assure Peter of his status after his betrayal.
Who do YOU say that Jesus IS?
That is the test of one’s belief.
RE: Who do YOU say that Jesus IS?
So, it is enough to confess that Jesus is come in the flesh and is of God and still not believe everything ELSE the Bible teaches (e.g. the LGBT lifestyle is fine ) and be considered a Christin?