Consider this. If Jesse is out to kill Walt by any means necessary, then I don't see a problem with Walt killing Jesse. But if Walt kills Jesse because he's afraid he's going to snitch or something, then I see your point of view. I really don't see Walt killing Jesse anyway because as I mentioned earlier, it seems that he has a genuine care for him. They were partners all the way, they went through a lot together, and Walt understands that. Walt almost considers him as extended family. So it wouldn’t sit well with me but again, as Darth said, you gotta do what you gotta do.
Whatever happens, it's going to be talked about and dissected for many, many years to come.
This show is going to be a college course someday. Unbelievable journey.