During a speech he is giving to army and marine commanders, Adolf Hitler denounces "the expression of any principles that stand opposed to the goal. Whoever doesn't convert must be subdued."
This is the principle of Gleichshaltung, or coordination, which characterizes Hitler's dealings with all non-Nazi institutions throughout German society. Based upon this principle, they must all agree to be incorporated into Nazi institutions or otherwise accept Nazi control; if they don't, they are eliminated. It's not necessary for them to be anti-Nazi in any way, all that's relevant is that they are non-Nazi.