What you choose to believe is immaterial. The common ancestor is even accepted by no less than Dr. Behe.
It's part and parcel of ID.
I don't believe either Behe or ID.. What they believe is immaterial to me.. What you believe is not.. For this dialog..
I've been thru so many iterations of what I believe, what I believed last week is not the issue, what I will believe next week is.. I started with evolution and escaped that box.. currently evolutionary concepts are merely cute, something for teenagers or democrats to fret over.. Any adult should be beyond all that..