Hello, and Welcome to the Forum TS!
I want to thank you for making this thread a very interesting read. There have been a lot of very good points made from many directions, and I hope to bring a new angle into this, something we are not considering up to this point.
First of all, I want to commend you for including Hitler’s victims as part of the loved people of God. It is obvious that you care about the atrocities, and your conscience is well-formed in that you detest what happened. Because of this well-formed conscience, you would emotionally shun any of such hurtful acts, and you are compelled to correct such wrongs.
What I would like to add to this thread is that it is part of the human condition that we project our own feelings and views upon God. Therefore, the question of “Does God forgive Hitler?” is centered on the question “Do I forgive Hitler?”.
Of course, one may have a tremendous revulsion to the latter question. “I have no right to forgive him”, “He does not deserve forgiving”, “It is none of my business”, “some people are unforgivable” etc. But the Gospel is very clear on the issue:
New International Version
And when you stand praying, if you hold anything against anyone, forgive them, so that your Father in heaven may forgive you your sins." Mark 11:25
So, if we hold anything against Hitler (and anyone of informed conscience should!) we are called to forgive him. But how do we forgive?
There is more to be gleaned from the Gospel on this issue, but I have written enough for now. It is worth noting the story of Eva Kor, who though Jewish has taken a more Christian approach to Hitler and the Nazis than the majority of Christians.
Thoughts?