Paris wasn't the only attack during that time and it wasn't even the largest. Kenya had the most, if I remember correctly. Just saying.
Yes, Adolf Hitler may be "evil," but it all depends on perspective. 6 million less people in the world, means a little farther from over-population. His desire for an enormous empire? How many empires have existed in history?
'Most of the evil in this world is done by those with good intentions.'
~F. Scott Fitzgerald