Ethics of pilots fighting for the sides in WWII

[ATAG_Dutch]

I'm a hypocrite.
I will not fly a Nazi German plane in a mission offline or online, unless testing a new map or the red team is full, and largely for moral reasons.
On the other hand I will fly japanese planes, because american fighters are hopelessly unmanoeverable and for straight lines only. Like American motorbikes.
I do like to fly american bombers though.

However I think I'm right in thinking that like every German soldier, every German pilot had to swear personal allegiance to Adolf Hitler.
They may have said, 'well yes we did but we had to', but they still flew around with a big swastika on their tails.
I can't bring myself to do that.

Sorry if this sounds like rubbish, but I've had a couple.

PS. Never post when drunk