At roughly page 277 (I'm reading a translation) of The Two Towers, where Gollum is talking to himself as Frodo is sleeping, it says:
Sam had lain still, fascinated by this debate, but watching every move that Gollum made from under his half-closed eye-lids. To his simple mind ordinary hunger, the desire to eat hobbits, had seemed the chief danger in Gollum. He realized now that it was not so: Gollum was feeling the terrible call of the Ring. The Dark Lord was He, of course; but Sam wondered who She was.
Huh?! I was fully convinced that Sam had been extremely aware of this threat since long before they ever met Gollum. How is it possible that Frodo did not think it was necessary to even mention this to his trusty companion and only friend, facing such extreme dangers? It seems downright idiotic by Frodo and putting them in an even worse danger.
In fact, in spite of the explanation that Frodo feels pity and mercy toward Gollum, I found it baffling how careless they both were in handling Gollum. Not even having his foot tied to the rope, allowing themselves to go to sleep both at the same time, etc. Even if Gollum didn't desire the Ring, or even knew about it, he is such a weird and sketchy figure that this alone should make them far more careful and cautious. They seemed to trust him for absolutely no good reason.
What on Earth did Sam think that Gollum was? Why was this weird creature following them around for so long and repeatedly tried to stab/suffocate/bite/attack/flee from them? Just some crazy guy who happens to have found them and is looking for "hobbit meat"? Even if that had been the case, Sam's behaviour is absolutely bizarre to me. And Frodo's is even worse.
Why exactly did Frodo (apparently) not tell Sam about this extremely important detail? Why did Sam never question or ask about it?
I also find it strange that Tolkien says "simple mind", as if Sam was some kind of mentally challenged hobbit. Maybe that's what's implied... But he seems very capable to me, albeit strangely submissive to Frodo in a way which I don't quite understand. But for him to think that this Gollum person was following them around to Mordor just to kill and eat them makes zero sense to me. Sam doesn't appear even nearly that stupid/ignorant in the rest of the story to me. To me, he just seems "slightly less sophisticated" than Frodo, and presumably relatively poor since he worked for Frodo back home.
I also don't understand why Sam would hold Frodo's hand and almost kiss it and cry over it sometimes. That doesn't seem like normal hobbit behaviour. Or even something that a servant would do.
This part actually made me uncomfortable, way more than the environment/setting of the story. It makes me feel as if I've missed some major point of the whole story. Maybe I am too stupid to realize that Sam has been described throughout the whole story to be a real "simpleton"?