Ignatius died sometime between 95-115AD, already a leader in the church. That puts the alleged “heresy” into the first century. Mind you, the scripture is enough to settle the matter all on its own, but it’s the icing on the cake to disprove the claim that these things were only invented hundreds of years later.
95 AD was after all the Apostles were dead.
You can’t show me where Paul preached that Jesus is God but I can show you where he preached that Jesus is the Son of God
Acts 9:20 ASV
American Standard Version
And straightway in the synagogues he proclaimed Jesus, that he is the Son of God