You misunderstand: God created the angels, Jesus was one of them, he sent Jesus to Earth, we crucified him.
You misunderstand your own dogma
https://en.wikipedia.org/wiki/TrinityThe Christian doctrine of the Trinity defines God as three consubstantial persons, expressions, or hypostases: the Father, the Son (Jesus Christ), and the Holy Spirit; "one God in three persons". The three persons are distinct, yet are one "substance, essence or nature".
By that same article: "According to this central mystery of some Christian faiths," which means, some, not all.