Assassin's Creed did have some funky AI. On the flipside, you could make the AI like the original Tenchu where enemies could see you through floor cracks and walls.

It is more or less the same in Assassin's Creed 2, but it depends more on your notoriety level. If you are at full notoriety guards will be suspicious of you from the get go. If you are like me, and drop your notoriety to 0 any time it gets above 0, then you can pull off insane kills like the one you posted.

When it's so obviously glitchy like that it's only funny though.

lol

That was kind of sad, I wonder if Brotherhood will improve on Assassin Creed 2's AI. 

This just goes to show how barbaric and simple minded humans used to be a few hundred years ago. To think we evolved from those apes..how uncouth!

Is this an erronic vision of how people were in the past? People aren't that much better today haha

The devs included a secret easy mode and that guy sucked so bad that he unlocked it

'what happened!? guys'

Dunno man. If you look at some of the gameplay stuff from Brotherhood, the AI seem weaker and dumber now because you can now dispatch a bunch of Asssassin's to kill a whole bunch of enemies in one go.