The Bible doesn’t mention a second chosen people. Only the Israelites and the gentiles. If you’re not a Jew you are a gentile. Period. Unless you have a scripture to say differently that’s all there is to it.
In Romans 9 Paul clarifies that the true Israel is comprised of those who put their faith in God justifying them. The physical Israel is not necessarily the same as the spiritual Israel. Many in the physical Israel rejected God.
But it is true that God has never said that a physical people is His own except for the descendants of Abraham through Isaac. Yet even those were able to reject their place as God’s chosen people, and God has also grafted into the vine those who have become His through faith in Christ.
Ultimately God wants us to all be His through Christ. Both Jews and Gentiles. Both Jews and Gentiles can reject that.
I do believe that God has greatly blessed us in America and that if we who bear His name repent, humble ourselves, seek His face, and pray, He will forgive us and heal the land in which we live.
You're right what you say about a biblical second chosen people . . . . .
unless
you consider
Genesis 12:3
“And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed.”
KJV
We have traditionally aligned with Israel and I'm pretty sure we can count our blessings based on that act.
I won't quibble, both views have merit.