Why many Christians believe women should not be pastors is not because of their intrinsic inability to be such.  But that's not it at all!  We believe this way because God said so: The Apostle Paul unambigulously said women should not be in Christian roles of leadership, and that command is given as part of the Holy Bible, the Word of God.

You can argue all you want that any of the other twelves tribes would have been capable priests.  But God commanded that only Levite men be priests.  And even then, it was male priests.  And the Twelve Apostles were men.  God calls the shots.  Mary Magdaline was extremely important, as was Jesus' mother, but they weren't formally apostles, either.

We drive cars on the right (in America) because the law says so.  Yes, we're perfectly capable of driving just as well on the left, but the law is the final word.

I am a male femenist at heart.  I am dying for someone to give me a compelling reason to doubt my interpretation and believe women should be pastors.  But I'm still waiting.