I would not overstate Trump's impact - you will only give him an even bigger head. In reality he is insignificant to policy as he will be gone soon enough. I would say Putin and Snowden were more of an impact.
In reality by 2024 the Bundeswehr will no longer be committing troops to NATO missions outside Germany (see above). If it makes you feel better to pretend that they are 'still part of NATO' then fine.