This DNA find does not prove the Book of Mormon is true.
This DNA find does shoot big holes in the false conclusion about DNA proving the Book of Mormon wrong.
Yet, many “Christians” will refuse the “new” evidence, because it does not match their pre-conclusions, and they will keep posting it anyway.
The fact that there is Jewish DNA in certain parts of Latin America is not evidence otherwise. Wherever there is Hebrew DNA, there are linguistic, cultural and oral history markers pointing to Sephardic Jews (my people) who fled the Inquisition in Spain & Portugal to the New World. DNA evidence of Sephardim intermarrying and (largely) assimilating is not "evidence" that should remotely influence any rational Christian/Mormon disputation.
For the record, I'm neither Christian nor LDS, so I have no beef in your dispute. I am, however, a supporter of efforts to reach out to those lost Sephardim who want to return to Judaism, and bring them back. Many have secretly kept Jewish traditions behind locked closet doors for centuries.