DNA and the Book of Mormon (and the Bible)

I don't want this blog to be full of my questions about Mormonism that would make me almost appear to be a dissident. So I'm going to bring up a few points about DNA and the Book of Mormon. There's a lot that can be said on this subject, but I really want to focus on how hypocritical it is when other Christians criticize the Book of Mormon for "failing" the DNA test. That is because the exact same DNA tests that they use to "prove" that the Book of Mormon is false would also prove the Bible false with pretty much the same logic.

Their arguments against the Book of Mormon go something like this:
1. The Book of Mormon teaches that the ancestors of Native Americans are completely/mostly/primarily Israelite (or Jewish in modern times.) Or rather, Jews and Native Americans share a common ancestor.
2. Jewish DNA and Native American DNA are not alike enough to indicate that they share a common ancestor.
3. Therefore the Book of Mormon is not true.

A lot can be written about the flaws in their logic, but I just want to point out how this logic stands up with the Bible:
1. The Bible teaches that ALL humans share a common ancestor (First Adam and Eve, then Noah and his wife.) By ALL humans, that must include Jews and Native Americans.
2. Jewish DNA and Native American DNA are not alike enough to indicate that they share a common ancestor.
3. Therefore the Bible is not true.

I should note that there was only 11 generations between Noah and Abraham, so if they believe #1, there isn't enough time between Noah and Abraham for them to conclude that #2 applies to the first example, but not the second example.

So, it is hypocritical of a non-Mormon Christian to say that DNA disproves the Book of Mormon, but not the Bible.