1. What's the difference? If he can swat the Aliens like insects, then they might as well be insects because they aren't fighting back.
2. If I choke you and cut off the oxygen to your head, you will do everything within your power to break the hold. That means kicking me, biting me, punching me, whatever. The Aliens did none of that.
3. I'll admit that AvP had more of an Alien bias, but Anderson did at least give the Predators some credit. The Brothers gave the Aliens none.
4. Indeed.
5. Lift two Predators? Are you referring to Grid knocking off Gill?
6. The Aliens may be massacred on mass for the sake of killing the 'bad guy', but that doesn't mean that if they go toe-to-toe with a Predator they should always lose. Even if there's only one Predator, he should sustain some injuries. Like in Predator, you know Dutch will survive because he's the hero, but he almost beaten to a pulp before finally killing the Predator.