... you have to conclude that Burke was EVIL with capital letters.
Then what would you call a person who tortures slowly another one to death with a big smile ? For HudaFuk, evil is when intentions are the worse possible, and the acts match these intentions and it didn't seem the case with Burke... unless if he was secretly killing two birds with one stone i.e. satisfying his lowest instincts when seeing Ripley and Newt in distress AND being able to let them through quarantine afterwards which would guarantee him fortune and/or fame.
On the contrary, if a famous person makes a donation for charity, but you learn that his/her intentions weren't altruistic but rather to be seen in a good light by others, then wouldn't you be a bit disappointed ? Intentions are important.
But don't get me wrong, if ever Burke had made it back to Earth and had got a trial, I would hope for him a very severe sentence.
Between you guys and HuDa, it is just a matter of definition of the word 'evil'.