Being honest, some people are not of value, and the world would be a better place without them. I'm not saying that that is the case for everyone in Yemen, but I bet there are far more of these type of people there compared with some other places.
Well, the world does seem to have too many people...
No doubt the people in Yemen have had a pretty terrible time, and are pretty screwed up as a result, but still I don't think it's clear that there are more of 'those type of people' there.
I don't want to put words in your mouth, but it sounds like you think they are passive victims, and the problems in their country aren't because of their culture, values, and past decisions. The truth is some cultures, values, and ethics lead to better, just, and more productive societies than others.
Another recent example from Pakistan. https://archive.fo/vnfcO/bc5b2f28c18bde325b0fceb09df681ad09f7a390.jpg
I have nothing against these people personally, but their culture is backwards and the cause of many of their problems. Hopefully they join the rest of us in the 21st century (or even the 20th century) and reject their bigotry, superstition, and hate. If we refuse to call them out on this and don't condemn it for what it is, we're really leading to more human suffering and should expect to see news stories like this for years to come. Sometimes "tough love" is necessary and right.
Some still think people are of value.