You yourself have judged the other countries in Europe were at fault and Napoleon was merely the victim of their jealousies. Is that not also a judgement
Going even further back, Julius Caesar conquered Gaul and enslaved millions of people, before launching a civil war and installing himself as dictator for life. Should he not be judged even though the Roman period was a few years back.
The United States launched an unjust war against the UK in 1812 for the desire for conquest. Should they not be judged.