There are two(2) evangelists who narrated the lineage of Jesus:
From the Gospel of Matthew where the lineage starts with Abraham.
From the Gospel of Luke where the lineage starts with Adam.
If the neutral side is out of the choices then go where your morality or beliefs would take you. Listen to the arguments that actually has content and try to do your research then this contradiction might be solve. The real world would always have problems whether it could be the system or the running of the system so contradictions would always be there due to opposing views we have. But when you choose a side, try to protect it and prove it with your point of views or experiences then a solution might goes within your palm.