I didn't "miss" it. I READ THE FREAKING DEBATES TO FIND OUT WHAT THEY MEANT BY THE TERM.
I would suggest that you do the same.
It is clear from the discussion entire debates that the people they meant to exclude by those words were Indians in tribes.
It is equally clear that they did NOT intend to exclude children of resident aliens, that they regarded those people born here as United States citizens, and that they considered they had ALWAYS been born citizens.
You are making your arguments from your own ignorance of the topic, imagining that you know something about it, when you don't. You read the words, and you say, "Oh, HERE'S what they meant by that."
BUT YOU APPARENTLY HAVEN'T FREAKING READ THE ENTIRE DEBATES, so your opinion isn't worth much.
Of course, even if you DID read the entire debates, every sign is that you just want the law to mean what YOU want it to mean, and don't care what it really said, and don't care what they actually meant by the phrase.
So it probably wouldn't make any difference if you read the debates anyway. Because you show every sign of being a straightforward denialist.
So either way, your opinion isn't worth much. Because as far as I can tell, you're simply not interested in reality.
It's clear even from that context of that particular sentence that he was referring to INDIANS IN TRIBES when he made that remark.