By making people believe these things will happen, they will create that energy, and put it out, depending on how many people believe God will 'punish' America like this.
There's a lot of stuff going on now in America God isn't happy about.
Look at how immoral, disrespectful, unethical, etc... ppl are, these days...No values, no principles... This won't be the straw that breaks the camel's back. The most important thing is treat ppl the way you want to be treated and watch your Karma, what you put out, etc...