Will no real Americans stand up anymore?
But this does not seem exactly like an attack on the USA. Rather it seems like an attack on Western Civilization.
As for what to do. My basic approach is based on what I learned at the Mir in NY--that the cure for almost any problem is to learn Torah. That is the Oral and Written Law. But the difference is that I add to that also Physics based on the Rishonim that did include that in learning Torah.
[I noticed this idea also in the beginning of the Avi Ezri of Rav Shach where he says that nowadays there is nothing one can do but simply to increase learning Torah.]
However I wanted also to add that "learning Torah" does have a limited definition. Mainly it means the actual books written by the Tenaim and Amoraim which contain the actual record of the Oral Law. But these can include some commentary. So for example I would learn a lot of the Maharsha and Tosphot in order to understand the Gemara.