I know this might insult the spiritual pride of many, but I don't care. It has to be said. A Trinitarian might be wrong in many points of doctrine; but I refuse to judge another man's servant:
Romans 14:1-4 (ESV)
1 As for the one who is weak in faith, welcome him, but not to quarrel over opinions. 2 One person believes he may eat anything, while the weak person eats only vegetables. 3 Let not the one who eats despise the one who abstains, and let not the one who abstains pass judgment on the one who eats, for God has welcomed him. 4 Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls.
God alone knows their hearts and is worthy to judge. Frankly... most Oneness Apostolics believe in a variety of errors too. One error isn't worse than another. We ultimately stand before God alone. Let is be careful... lest we see sincere Christians with misunderstandings being welcomed into the Kingdom of God and our own selves cast out. If we know greater truth... more is required of us than those who have misunderstandings or have embraced traditions that are well intentioned mistakes of interpretation. For unto whom much is given... much is required.
That being said... sure... critique doctrine. Point out what are believed to be errors. We are the Revival the classical church has been praying for. We are NOT a separate religion.
P.S.
Only God can give the Holy Ghost. And yes... God has given the Holy Ghost to Apostolics who believe in Annihilationism (ERROR) and Trinitarians (ERROR). That is because God KNOWS the heart. We don't. One day Christ Himself will correct us all regarding those things in which we have been mistaken. And I fear we're going to not enjoy that hour. None of us.