The Apostle John made it quite clear that it is impossible to worship the Father and to deny the Son at the same time. No can do.
The “god” worshipped by Jews, Muslims, Unitarians, Jehovah’s Witnesses, the Worldwide Church of God, The Way International, the Assemblies of Yahweh, the Millennial Dawn, the Apostolic Church of Jesus Christ, United Pentecostals, and the list goes on, is NOT the Father according to 1 John 2:23:
Whoever denies the Son does not have the Father; the one who confesses the Son has the Father also.
To make sure that we did not miss this point, John put the proposition in both a negative and positive form:
Negative: Whoever denies the Son does not have the Father;
Positive: the one who confesses the Son has the Father also.
See how easy that is?
The idea that all religions worship the Father just under different names is an idea totally foreign to the Bible. Only the Trinitarian can truly worship God the Father because only the Trinitarian worships the Son and the Holy Spirit.