Now Bob, I think you missed a whopping big piece of what Taken represents. I'm not some jaded middle-aged guy, but I have a girlfriend that I care about very, very dearly, and when I was watching Liam rip the pistol out of a man's hand and pistol whip him in the temple with it (repeatedly), a part of me understood entirely the anger behind every swing. If my girlfriend had been kidnapped for very real threat of human trafficking, I would likely BURN PARIS TO THE GROUND to find her and ensure she didn't wind up in some disgusting crime lord's heroin-addicted harem.
Taken 2 has a cheesy premise, it's trying to build some kind of mythos around it as if Liam were a grim and gritty American James Bond and that brand of desperate, rage-fueled and downright illegal aggression he implements were something he did every day and not just because his daughter and/or wife were being kidnapped. That is where the sequel starts to come apart, making the kidnapping of his ex-wife and daughter little more than a means to keep the now-franchised name in the title, while treating Liam's ferocity as just another tool he uses in his bad-ass arsenal. You could have easily cut out the kidnapping and the overall plot of the film wouldn't have been changed much.