A factually incorrect statement. Here is the Heritage Foundation paper on this topic:
https://www.heritage.org/the-constitution/commentary/what-the-constitution-really-says-about-race-and-slavery
(A factually incorrect statement.)
I disagree! Here’s the very first legislation by the first Congress pertaining to immigration called the Naturalization Act of 1790. They wanted only free White people to be citizens of the new United States of America.
(The Naturalization Act of 1790 (1 Stat. 103, enacted March 26, 1790) was a law of the United States Congress that set the first uniform rules for the granting of United States citizenship by naturalization. The law limited naturalization to “free white person(s) ... of good character”, thus excluding Native Americans, indentured servants, enslaved people, free Africans, Pacific Islanders, and Asians.)
Do you believe that the 13th Amendment was in the Constitution at its founding? There is a bit of a date discrepancy therein.