unfortunately,,those 3 groups which you mentioned hate to accept the truth already,,and thats why they confuse themselves,,and follow (what they wish) and not what the God of the Bible really said or sent his prophets for...!! you even will Never FIND A SINGLE verse at any (Torah) or any (Gospel) ,, when God asked or even ask from anyone to be a Jewish or a Christian or a Jehovah Witness..! not a single verse ..! but Only to be a believer who submit to God (The Creator)a and his will.. but nothing about being any of this 3 groups.
plus that the title (Son of God) simply means those who truly obey God..those who loyal to him and his laws and worship him ,,etc,,not sons by the meaning of the word,,its a metaphorical term..and last thing,,Jesus (pbuh) was a prophet who is sent to the nation of Israel,,according to what he said by (himself),,,not what i think or what i wish,,but those 3 groups hate this fact also,,every one of them want to make Jesus what they want..! not what he really was .. !