They will say the aliens look just like humans, and demand to kidnap kids to train them as elite alien hunters. They will give kids goole chips to identify each other wth their google glasses, and they will all glow green through the glasses, but of course the aliens will glow red. No thought necessary, trust the science. The aliens look just like people and you can't trust them. Edit: yes this is the plot of a black mirror episode called man against fire