The Germans have a natural leaning towards expressing themselves as a forward-looking, liberal, peaceful nation for obvious reasons. Most are pro-NATO as a defensive organisation, but they too have seen too much use of military power on their televisions in recent years to feel comfortable with. Certainly outward expressions of support for such things do not sit comfortably with many.
Thanks. Plus the fact that many of my countrymen lived under the decades long thread of being THE nuke battlefield AFTER been bombed to Kingdom come in 39-45 made at least some of us think twice before making the "Texan" approach (shoot first, ask questions then) our preferred mode of foreign affairs.... recent criticism of NATO in Germany was well deserved (IMHO) after the partly stupid eruption of aggressive horse manure out of the NATO HQ during the early phases of the current problem in the Ukraine.