I disagree, but lets move the conversation forward.
Do you think it was okay for them to be separated from there country, people and families after WWI?
Don't you think doing this would naturally cause major issues, possibly leading to conflict?
You talk as if they'd planned to join Poland and get themselves deported to Germany (not without bloodshed, by the way) five inglorious years later.
Dreams, oh dreams, where is your sweet bliss?
Love's gone cold, and all that's left is this.