Jesus prayed that we MAY be one. But we're not one with God. We fall short. For all have sinned and fall short of the glory of God. There is none good but God alone. Was Jesus good or wicked like other humans? If he was good, then he was also God. Also, nowhere in scripture does anyone claims to have existed before Abraham. You don't get your anti-Trinitarian objections from the Bible. Jesus prayed so he can't be God is not an objection when the answer to your objection is found in the Bible. He humbled himself and became man. He did not come to be worshiped or to be served. He came to serve and gave his life as a ransom for many. What's your next objection? Jesus went to toilet so he can't be God? Jesus died on the cross so he can't be God? When you don't understand the dual nature of Jesus, and you assume that everyone can have only one nature, you're bound to come up with silly objections like that.