This is incorrect. The kid you're referring to is not a member of the Houthi tribe, and there's no evidence he's a terrorist aside from him saying some angry stuff on social media (and what teenage boy hasn't, especially one living right next to a country committing genocide). I'm sorry but that's just not enough to call someone a terrorist, and calling him one anyway is pretty shitty. Words have meaning, please try to treat them as such.
Are yoiu refering to Israel? If so, Yemen and the Houthis are not close to being ‘next to’ Israel - it’s about the same distance as Paris to Istanbul (approx. 2000km).
To expand slightly on the point: look at what teenagers from very comfortable, peace-ridden, rich western nations are saying online. Some of it is quite normal and unproblematic, but some of it is unhinged/uneducated (take for example 4chan). My point was that having had a genocide committed against you (or if you don't like that term for what SA did; a military invasion) as a teenager is probably gonna make your comments lean a bit more to the unhinged/uneducated side. I think that's normal and expected.