Russia and Ukraine

[Deesse23]

...and then had to rebuild their culture and mentality which Russians had a part in

I dont think so.
1/5 Germans are eastern Germans. The last russian troops left Germany more than 30y ago. Any German who consciously experienced russian occupation is at least 40-50 now.
These two facts together probably lead to 1/10 Germans today who ever experienced russian occupation and its ramifications.

So it is probably very psychologically hard to send tanks that will fight against them. It's almost like encountering the old daemon that they had with Russia.

Its less about Russia and more about getting directly involved in active wars with german equipment playing a central part, which Leo-IIs of course would be.