If you give credence to the aggressors’ “reasons”, you haven’t thought things out very carefully. The ideology behind those aggressors has to be scrutinized: any socialist will complain that those that they regard as “bourgeoisie” are treating them unfairly, and the ideology behind Imperial Japan had elements of socialism as well as similarities with Islamic expansionism.
It is nice that you know history but modern Russia is not an aggressor. And Russia is barely an aggressor too.