Add to that the fact that non-Jєωιѕн detainees were either Protestant or Catholic. That's just how it works in Christian countries.
The Waffen-SS: By the virtue of the quantity of its volunteers, held a Catholic majority throughout her ranks.
Not to mention Germany's allies.
Most of the Christians who were tossed into one camp or another was because they were considered disloyal or worse plotters to overthrow the government. In a time of war, or any other time for that matter it's called treason.