The MPPC's near unanimous vote to end its Presbyterian affiliation was an exclusionary action. Yet, claiming to be a "biblically based church ... to follow Jesus" is a statement sufficiently vague to include or exclude anyone according to how the MPPC interprets what it means.
There is no single "bible," a canon of selected writings. Many bibles exist with varying contents. Some common ones are the NIV, the American Standard, and The Jerusalem Bible. There is no one unique Jesus. Four differing Jesus' are the subjects of Matthew, Mark, Luke, and John. The MPPC's chosen bible contains a plethora of contradictory statements about Jesus. The MPPC has no doctrinal discipline against which a person can be labeled a heretic (perhaps an advocate of gay marriage at MPPC) or not.
The MPPC can be an honest, welcoming institution if it is astute enough to plumb the depths of its religious world to reach out to others and learn what it means to be human.