Hi Mr.Newton,
What I am going to suggest has little to do with church or religion. Rather it is an important distinction.
If you hold that Jesus can't be his own Father then in relation to the material world you are correct. As you suggest in terms of cause and effect this is a silly idea.
Given this you are putting forward a Nominalist position. Nominalism denies the existence of universals or other abstract entities, e.g.. God.
Most people who believe in God can be described as Realists. What I am suggesting is that you can't be a Realist and a Nominalist at the same time.
Regards
Tut