It's actually been more then a few hours, and he shows no signs of changing his mind any time soon.
Also, he witnessed both his mother and Snow falling. So it's not like it seemed as if Snow let her go to save her life, and in fact held on for as long as he could. Even at a distance that wouldn't have looked intentional on Snows part.
To further illustrate the point I got to thinking there are more to Hope's actions.
Recall during the mothers recruitment to fight, there was one gun left. The person Snow offered it to first was Hope, who couldn't bring himself to do and backed away, allowing someone else to take up arms. Where his mother offered herself willingly to fight, Snow himself cowered away.
Imagine how that must feel? I'd imagine he's rather disgusted with himself over that. And given he already has shown his denial of reality, I'd fully imagine his blaming Snow to be that as well as his way of hiding his own failings to himself. I probably worded that last sentence horribly.
Edit: Two final things.
1) I do believe they will have Hope become strong however, and accept reality at some point. Overcome his weakness's and all that. Though part of me secretly hopes this character flaw of him doesn't so much as be overcome, but overcome him and he becomes a villain, but thats just a little sick part of me wishing for that. ;p
2) I don't really think it has anything to do with liking Snow or not. I love Snow, though in all honesty I find Hope has far more depth as a character.![]()