Nah the new wave of ancient DNA analysis since 2010 has been a game changer. Especially with euroasian history. It showed us how populations migrated and how and when admixture formed. Including identifying the yamnaya admixture in modern populations
If they actually have Columbus’s DNA intact with a good SNP resolution, it will be trivial to find out what % of jewish he is in his autosomal DNA. They can and should release it publicly as part of their paper as well. So people can confirm their hypothesis
