What's your problem with simple truth in advertising, or insisting that job applicants are actually qualified to do the job they're applying for?
As the author points out, there are 121 denominations and then some of Christianity. He points out that there are disagreements over the "fundamentals" of faith and gives as an example the fact that a large number of ministers don't believe in the "resurrection."
Some Christians believe the resurrection was a physical event, and some believe that it was a spiritual event. So, can we come to some agreement about this by sitting down and talking about it? Maybe.
Furthermore, and this is more to the point, some Christians believe that in the Last Days there will be a physical resurrection of the dead, while others believe there will be a spiritual resurrection of the dead.
So, to answer your question, no, I don't think it's too much to ask that Christian pastors believe in Christianity. But there are at least 121 different definitions of what that means.
Should Christians set aside their differences and unite? Of course they should. Will they? I doubt it.
What's your problem with simple truth in advertising, or insisting that job applicants are actually qualified to do the job they're applying for?
Malcolm Muggeridge referred to the Anglican priesthood as "the only profession where the willingness to purjure yourself is a job requirement."