How does Lurk feel about humans? Ghouls? Super mutants? other lurks? Does he realize some people eat lakelurks, and does he or would he have feelings about it? How does he feel about cannibalism or eating humans? Does he have any aspirations or goals in life?
Lurk feels the same way about everyone: if you aren't shooting or stabbing or punching him, and manage to hold your tongue about the whole swamp monster thing, he doesn't have a problem with you. The most important thing to remember is that, while he has the conscience and mental capacities of a person, he grew up and lives like an animal, prejudices are completely foreign feelings to him. Sure, he dislikes some people, but it's because they've done something to make him feel that way, not because they're a man/woman/ghoul/mutant/robot/animal/etcetera.
He is also, yes, aware that people eat other lurks, but since he only barely recognizes them as being kin, he has no strong feelings about it. It does give him a healthy dose of caution when around people with obvious weapons, though, since he has been hunted for in the past. As far as eating a person, or even another lurk goes, it isn't something he would do; not so much because of morals, but because rich or red meat in particular disagrees with him. He prefers fish and other seafood, as well as water plants and roots (punga fruit, not so much).
Lurk has no real goals, except to just keep on truckin'. He doesn't care that he doesn't know where he came from, or why he's different, and has no desire to achieve anything more in life than to not die.