I hear you. It's rather hard to convince anyone of anything, and the best we can do is listen and try to understand other people's perspectives.
While I personally don't favor retreat, I acknowledge that many do. I find it interesting to consider that our opinion on fighting versus retreat underlies our perspectives on illegal immigration, though obviously we're influenced by other factors and beliefs as well.
Please, for the love of all that is good, don't subject yourself to videos like that anymore. I mean, it's good to be aware of what's going on in the world, and it helps to make the point you made, but still, what nightmare material.