They still cling to the image of the US as the great protector, while the rest of the world has realized that they have to become independent from them to make sure they are safe. An US which changes allegiance on a whim depending on a vote every few years cannot be a stable ally, and much less a protector. We have to be self-sufficient, and also able to protect ourselves from our previous protectors, because they are not to be relied upon - in reality they might be the biggest aggressor we have to defend against because of their megalomania.