I agree but I wouldn’t write the US off quite yet. There are millions of good people in this country. So long as religious freedom exists and people can hear and accept and live the gospel, I don’t believe God will destroy this nation. But all bets are off if religious persecution becomes intense enough that people can’t fairly learn and live the gospel.
I have a feeling that persecution of Christians, which has been ramping up (for example, in the workplace and schools) will become worse as believers continue to take a stand for our faith. You’re right, that will be the final straw. But if God be for us, who can be against us?