All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
Indeed you did well by not believing in the trinity or that 'Eesaa (Jesus) was God. This is something which is logically impossible to believe in [and no one with a sound mind and reason would believe in it]. The pioneers of these false ideologies do not have any evidence proving them and they get very disturbed and frustrated when they are asked to interpret them. It is very strange that you do not believe in the trinity nor that 'Eesaa (Jesus) was God, yet, you believe that he was the Son of God and that he was the first of God's creation; what is your evidence on this? Indeed whoever claims something is required to provide evidence, however, a claim cannot be taken as evidence. We do not think that you have any evidence from the texts of revelations or any logical evidence which proves this. In reality there is no evidence on it, as this is something logically impossible. So how could it be possible that God could have a son, as He is the Almighty, the Creator of everything, Who is controlling the whole universe, Who comprehends all things in His Knowledge and has the power over all things, and Who is not in need of His Creation but all His Creation depend on Him, an Who has other Attributes than those mentioned above. Did He really need to have a son? If it is the case [if He needs a son], this means that He is not Perfect and He is deficient, and a real God is high above this. If 'Eesaa (Jesus) was really the son of God, how can God leave him to be crucified as the Christians claim? God has power over everything, so He could prevent His Son [as the Christians claim] from being crucified.
As regards your statement that we inherited our sins from Aadam this is an injustice to him, as he repented from his sin and God forgave him. So no one inherited his sin. Even if we presume that he did not repent from his sin- and this never happened- with what fault would billions of people inherit this sin? This is an injustice upon which God is High Above. Therefore, you should not believe in some creeds and disbelieve in others. Since you did not believe in the trinity or that 'Eesaa (Jesus) was God, then you should disbelieve in all those false creeds and believe in Allaah Alone, the Self Sufficient Master whom all creatures need (He neither eats nor drinks), He neither begets nor was He begotten, and there is none co-equal or comparable unto Him. You should use your sound mind and reason and leave aside your desires, and sincerely seek the truth, only the truth. Besides, you should keep contact with the nearest Islamic centre to you or with Islamic sites which spread Islam, you should ponder about the Islamic creed which is based on the Oneness of Allaah. There is no doubt that if you do so without any prejudice, then you will not be happy and live in peace and tranquillity unless you sincerely testify to the Oneness of Allaah as He is the Only True God.
Allaah Knows best.