Hitler used furnaces to dispose of what he judged to be human waste. Did he get the idea from the Lake of fire? Idk, maybe. Yet, he was seriously mistaken to think that he was anything near to righteous.
God's righteousness is all encompassing of the definition of righteousness and not just 'because He said so,' as was the only reason for those such as Hitler.
His will, desire, is that all men come repentance and to the knowledge of the truth, but His judgment, decree, is that those who believe on the Lord Jesus Christ will be saved.