Wrong, very wrong. It was actually almost the other way around. The Arians continued long after Nicaea, in fact, the Emperor Constantine may have had sympathy for Arianism, and we know that two of his successors to the Roman Empire were Arians including his own son, Roman Emperor Constantius II, who did try at times try to push his Semi-Arian beliefs onto Trinitarian Christians. Furthermore, Arianism survived for a long time more in the Gothic Germanic tribes to the north of the Roman empire, and when the Vandal Goths conquered north Africa in the 5th century, they heavily persecuted Trinitarian Christians, suppressing Trinitarian worship, and executing/killing Trinitarian priests. Ultimately, by the 7th century Arianism died out on its own, as most of the Arian Goths converted to Trinitartian Christianity on their own with the help of Trinitatian clergy. The best example of this is when Spanish Visigoth ruler, Recarred I, converted to Catholicism from Arianism in the 6th century. There was some suppression of Arianism when the tables turned, since for a long time it was Arians in power, not Trinitarians, but for the most part Arianism just died out on its own.
HEAVENLY FATHER is a living, breathing Being, once a Man like us, who now lives on Kolob. The SAVIOUR was the GOD of the Old Testament, and HIS Name is JEHOVAH. JESUS of Nazareth is the Incarnation of the Old Testament GOD, whilst HIS FATHER, ELOHIM, is Our Eternal and Literal FATHER in Heaven. The Trinity is a Myth. The HOLY GHOST is a Personage of Spirit but appears to take the Form of a “Man” as “HE” appeared to the ancient Prophets in the Americas.
Not all Christians accept the Trinity. The Arians did not, and they were all exterminated for it.
“God is spirit, and his worshipers must worship in the Spirit and in truth.” - John 4:24
And as already said, no, the Arians were not “exterminated.”
11 And now I am no more in the world, but these are in the world, and I come to thee. Holy Father, keep through thine own name those whom thou hast given me, that they may be one, as we are.
Jesus is using a simile there, did you forget grade school? Besides, the members of the body of Christ are, in no doubt, “one” in a similar way that the Father, Son, and Holy Spirit are one in the Trinity because we mimic one nature.
17 Jesus saith unto her, Touch me not; for I am not yet ascended to my Father: but go to my brethren, and say unto them, I ascend unto my Father, and your Father; and to my God, and your God.
Alright? All that demonstrates is the hypostatic union, Jesus being man was created by God in that sense, as a human being he worships God as his God.
“Who, existing in the form of God, did not consider equality with God something to cling to” - Philippians 2:6
“In the beginning was the Word, and the Word was with God, and the Word was God.” - John 1:1