All communist countries in Europe could demand reparations from Russia and frankly Russian people could demand those from their elites as well since they did not want the shitty regime either.
If a country is left only accusing another country for their own short-comings, then know that you have been given a shit-sandwich and are willingly eating it. Also you would be surprised to know that many people in Germany back then did not feel like going to war. Refusal to do so would have meant execution of your family and yourself - yeah was all great fun for them.
Syriza could demand real changes:
+ say fuck you to banks and say you don't pay
+ modernize the country
+ clamp down on top plutocracy hard
And most importantly:
+ create an independent central bank
+ issue interest free sovereign money
+ leave the EU ASAP
The last 3 steps would be literally deadly for any politician attempting to implement that.
And yes - those measures would create prosperity for the Greek people, but who cares - convince the sheep that forcing Germany to pay a couple billion will make things MUCH BETTER. That cash can be used to pay off some debt - will cut it from 150% to 100% of GDP - that will improve matters indeed.
Never ever listen to any politician demanding old-time reparations - chances are it's only ending up being pulled from people who had nothing to do with it. It reminds me of some of the reparations that some black people demand of the whites.
The truth is that only 1.6% of the population owned slaves and in addition to that those very same 1.6% owned white slaves up until 1800 as well. In fact the first 500.000 slaves in the US were almost exclusively white.
So who do you demand those reparations from? Trust me - it will be the never-owning 98,4% white population paying - even worse it will be partly the descendants of white slaves paying as well.
The past is past and the real profiteers of wars are never really the entire people. Talks of reparations create a victim mentality and should be avoided.