Most Protestant denominations are over style, not substance.
Among those who accept Sola Scriptura, the main divisions would be:
Infant Baptism vs Believer’s Baptism
Calvin vs Arminius (or should I say Augustine vs other Catholic theologians)
In 40 years as a Protestant, often using military chapels with varying denominations providing the pastor...that is about it.
That's absurd...That's like saying St. Mary's Catholic Church on Front St. is a different denomination than St. James Catholic Church on Main St...