We are modelers and as such, when building military models, need to show them with their proper flags / emblems.
I do not see any issue if treated as such, and not as "propaganda".
Some people are indeed still very sensitive re the WW2, however, even if history is not to be forgotten, this is past and happened more than 80 years ago.
And same problem could apply to other nationalities or wars.
Btw, I am French.
I agree. If modeling a subject, I want to make it as accurate as possible
However I do feel conflicted about modeling subjects from "the other side' in general
For example
I love WWII Naval stuff. That includes Japanese ships
The conflicted part comes in modeling something like the Akagi
It was one of the carriers that launched a brutal attack against Pearl Harbor where many American lives were lost,
I can't help but wonder how a WWII Vet who served in the Navy and was possibly stationed there might think of me proudly displaying my painted plastic "honoring" that ship. How would someone who was on a ship that was sunk or damage by Kamikaze attacks in the Battle of Okinawa be happy to see my Zero. Would my grandfather who was a WWII Navy vet and had a tattoo on his hand commemorating all the friends he lost at that battle be happy to see my IJN collection. Maybe they would care, maybe they would not. It is not for me to decide
Now the reality is, I just think it is a fascinating subject that looks cool and obviously am not condoning anything, but then again I am just a modeler modeling historical subjects
After all, no one will get mad if I model an Imperial subject from Star Wars for example. I can't help it if the bad guys ships have cooler designs that I would like to model. Plus you need some "bad guy" models for your "good guy" models to fight
Also time has blunted the impact of things like that.
i.e. there are a lot fewer people these days who would have been directly involved, and for much of the last few younger generations it has no more emotions or stakes attached to it than some fictional movie or even some battle that happened in ancient times
However, unlike certain other things, I can see how the stigma for a Swastika has persisted.
It is still in use today by certain groups as a symbol
i.e. the reality is it can still be too close for comfort even today
Am I offended by seeing it on a model?
No, as long as it is not overtly glorifying anything with a clear ulterior motive (for example, the builder is posing in a KKK Hood and his tag is accompanied with some rant about master races)
Otherwise it is no different than browsing through some pictures of WWII events