Liam Neeson became a bad ass in the general public’s eyes with Taken. He had a very particular set of skills and he used them.
For Taken 2, one of the parents of a dude he killed is coming back for revenge. That revenge involves kidnapping his family. You’d think that messing with Neeson’s family would be a bad, bad idea. But no, villains will keep doing it. I mean really, he only strapped mini bottles to his hands and killed a wolf.