There is no question about it. Aliens are stupid. Those ugly, malformed and evil creatures that have been coming for a long time to our beloved planet to create panic and confusion.
Aliens are ignorant, they don't know nothing about the intricate ways of the human brain. They see humans as experimentation creatures, not for their real value -tasty brains-.
Then they come in this non-ecological spaceships just to play with humans, puncture them, abduct them and later on return them all confused (as is...). They don't care about zombies...they see us as disposed-humans. What do they know. We are way more valuable than they and we are smart (we don't lend money to those Greeks, for example). I hate aliens and the movies about aliens also. Aliens are ugly, unfriendly and single-minded.