There's an interesting poll (by forsa, commissioned by the journal Stern) about defence issues in Germany:
"Sollte Deutschland seine Verteidigungsausgaben in den kommenden Jahren erhöhen?"
(Should Germany increase its defence spending in the next years?)
Only supporters of the far right AfD and the liberal (pro-employer and usually pro-tax decreases) party FDP are in favour of increased defence spending.
"Sollte sich Deutschland militärisch noch stärker am Kampf gegen die Terrormiliz "Islamischer Staat" beteiligen?"
(Should Germany participate even stronger in the fight against the terror militia "Islamic State" militarily?)
"Sind Sie dafür, dass die EU-Staaten eine europäische Verteidigungsunion aufbauen und ihre Streitkräfte zusammenschließen?"
(Are you in favour that the EU states create a European defence union and join their armed services?)
I disagree with the majority on latter one, but that's for reasons of above-average knowledge on the subject. I suppose the vast majority of responders merely thought about the issue on the political level, where we learned that cooperation is a hugely successful approach most of the time. Sometimes it's not the best choice, though (same problem as with the common currency).
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I have seen very an international poll about the willingness of men to fight for their country, with Germany ranking really low. I don't care about such polls because I think the reason for such a result is the feeling that we're not threatened. All the irrational aspects of readiness to fight only come into play once you feel that you or your community are under threat. Without this, only factors like grandstanding, versions of masculinity cult or a high esteem of the armed services will lead to a high rating in such a poll.
Regardless of what certain nutjobs all over the world claim, Germany is not in any real trouble, particularly not by external threats (including immigration).
Our pressing challenges aren't foreign ones, but domestic ones. We should correct the course on several harmful trends and restart our efforts to improve our system of government substantially.
Foreign "threats" are little more than bogeymen that scare the simple-minded ones, with a fig leaf of basis in reality. The polls above show that Germans aren't easily scared by bogeymen, unlike many other countries and the German far right.