Simple answer. For months, Sky Kru has been raiding Mt weather for supplies, which probably meant a whole lot more weapons and ammunition as well. In Season 1, the grounders had lest problems going against the 100 because they had few guns, very little ammunition, and a much smaller number of people.

Not just the prisoners. Monroe took up Bellamy's chant too and he wasn't a prisoner. And there was several other ark residents who had gathered around the hubub and had started chanting too. You need to consider that before saying sloppy narrative

I think the fact that Jason inserted that part where everyone is chanting Pike's name while he's being led away is prove enough its not poor narrative but brilliant writing. And the fact that Jason did an interview in which is he explained most of this is another fact that supports my thesis.

Dozens of people were demanding Pike be put on the ballot that's why

He's not suddenly, meekly, following Pike. Its called shared interests. Pike is interested in going about things the same way he does.

Think about it. Bellamy was also with them. I don't think Kane wanted to get Bellamy killed by warning Indra.

Because that one guy stirred up the whole group to demand it

you say re-watch season 2 bellamy. Take a closer look at season 2 Bellamy, the guy who told Kane in episode 2 season 2 that he thought if they had more guns they could have defeated the grounder army. Now he has more guns. Lets see, season 2 Bellamy was against the alliance from day 1 and was only focus on getting…

Because like He' told Bellamy, he's planning to seize territory from the grounders and build up their own land

Bellamy's change was natural. You need to take a closer look at his actions in season 1 and 2. He never trusted grounders back then and he only went along with them in mount weather because Echo saved his life and because he had planned to use them to help him attack the mountain. But the grounders wound up betraying…

Okay. Say you warn Indra. Then Pike would figure out you betrayed him and would probably kill you as a grounder sympathizer.

They didn't need to flesh out anything. Any smart viewer and someone who watched how Bellamy acted in both of the previous seasons would easily see Bellamy had never really changed, just like he told Clarke

He's the same. He was always a hot head and quick to action. Its just that after he did some heroics in mt weather people automatically forgave him and claimed he had some major character change. Nope, not true. He started mistrusting grounders again the second Lexa pulled out and left them to die in the mountain. And…

Bellamy was refering to Maya and all the others who helped him in mt weather. He still blames the grounders betrayal on them

I guess you need to re-watch season 1 again. This exactly the same bellamy. Even Bellamy's actions here, He was always for killing grounder warriors, just not the women and old people like Fin did. The same as in this massacre. Bellamy balked at Pike's plan to hit the grounder village. See, he's the same bellamy. And…

No? What do you think Juliet told Adalind right after Adalind said, "I'm her mother! She belongs with me!" And Juliet says"Its never going to happen." Sounds like boasting to you? Or worse, just plain mean, telling a mother she will never get her child back! I get why Juliet said that though, since she was mad at…

She took pleasure in telling Juliet after juliet was basically boasting about taking Diana from her. You forgot that.

Simple, she didn't see nothing wrong with her hexenbiest powers then as she felt useless without them. After having Diana though, that weaned off and she started to see she didn't need to be dependent on her powers to be happy. Renard and her mother was to blame for that as , before throwing her out, they told her…