Princess my sincere apologies if you are not keen on the translation I chose.
Thank you so much for your feedback! 
The reason I chose it is because it makes clear what one has to disbelieve in - Islam, the Quran and Prophet Muhammad – in order to be consigned to Hell.
But if we take, say, the Pickthall translation,
Lo! those who disbelieve, among the People of the Scripture and the idolaters, will abide in fire of hell. They are the worst of created beings.
It is ambiguous as to what is being disbelieved in.
However, if one wishes to stay with this version of Pickthall, who was an English translator, elucidation is provided by, for example, surah 5 Al-Maida:
They surely disbelieve who say: Lo! Allah is the Messiah, son of Mary. The Messiah (himself) said: O Children of Israel, worship Allah, my Lord and your Lord. Lo! whoso ascribeth partners unto Allah, for him Allah hath forbidden paradise. His abode is the Fire. For evil-doers there will be no helpers. (72) They surely disbelieve who say: Lo! Allah is the third of three; when there is no God save the One God. If they desist not from so saying a painful doom will fall on those of them who disbelieve. (73) Will they not rather turn unto Allah and seek forgiveness of Him? For Allah is Forgiving, Merciful. (74) The Messiah, son of Mary, was no other than a messenger, messengers (the like of whom) had passed away before him. And his mother was a saintly woman. And they both used to eat (earthly) food. See how We make the revelations clear for them, and see how they are turned away!
So, from my understanding, believing that Jesus (Isa ibn Maryam) is the Son of God is shirk of the worst kind and it is this that will see you going to Hell.
There were actually Jewish Jesus followers - People of the Book - who were Unitarians and they would have been considered acceptable. It was the Trinitarians that merited the wrath of Allah.