I just wanted the owner of such a distorted tendency be sent to a concentration camp.

I could have exposed them sooner.

It would have ended there, and everything would have stayed the same in the end.

....But, when she actually died... I finally noticed...

The distorted one was me.

...So, the doctor wanted to kill himself because he regretted that he couldn't protect the woman he loved.

That's why he decided to stop hiding, and threw himself into the war.