I don't understand people who totally root for Walt. I understand rooting for Walt, because he's a great character...but if you don't see where Jesse is coming from, you're kinda nuts in the head. If you can't see how Walt ****ed his life up 20 ways to Sunday....well....Christ. Walt does care about Jesse. But even so, he still let his girlfriend die, when he could've saved her. He still poisoned a child, which is a horrible thing that you cannot justify. He constantly manipulates him and lies all the time.
Walt is a *******. But the kind of ******* to love. He's just like Scarface. But saying Jesse needs to die, is like saying Tony did the right thing by shooting his friend for dating his sister. You can blame it on Jesse....but who lured him in the first place? Who pulled all the strings? Who killed Gus Fring, Mike, Hector...ect....just so he could create his super empire of meth? Jesse wanted out on multiple occasions. But Walt, sucked him back in.
C'mon.
I think you're failing to see who Jesse was to begin with. Even without Walt in his life, "Captain Cook" wasn't long for this world. Hell, you could argue that Jesse wouldn't have even existed up to this point, had it not been for Walt killing Emilio and Crazy 8, as you know that Crazy 8 most certainly wasn't going to let his cousin know that he was an informant.
Same goes for Jane. Did you really think they were just going to quit, cold turkey, when they had all that money? Jesse even admitted in "Fly" that he would've been dead inside of a week. I get that Jesse loved her, but Jane was no good. Was Walt wrong by not saving her? Absolutely, but, when a solution to a problem arises, by a
(un)happy accident, most of the time, you don't say, "nah, I'll find another way."
Brock was a means to an end. Walt knew what he was doing, and, again, although it was an undeniably horrid act, it was for the greater good of he and Jesse. It was only a matter of time before Fring decided to expunge Jesse and Walt from his business (or, rather, from life, itself), and Jesse needed a "dramatic example to shake him out of apathy," to paraphrase Batman Begins.
Walt isn't a good person; he's nowhere near as pure as his product, but he isn't all bad, either. While one could argue that everything I stated above was strictly for self-preservation, I think that he did all of it just as much for Jesse as for himself. It was only when Jesse became a threat to his own family that he made the decision to call in Todd's uncle. Going back to The Godfather films, Walt loves Jesse like Michael loves Fredo, but, at the end of the day, you can only deal with so much betrayal.