What of the Lamanites,DNA.and lost tribes?

Mormons teach ,as does the opening page of the Book of Mormon that all,or mostly all mesoamerican native peoples came from Israel.(in separate migrations pre Columbus).
DNA.experts beg to differ.Careful dating studies with DNA.and family lines shows that their ancestors came via the Asia-Alaska landbridge.They migrated south and east throughout north ,central and south america.No need to belabor this one…just to say that the LDS need to rethink this one.
Can any horse,cattle,elephant bones-artifacts be found anywhere preColumbian in south America?See Simon Southerton,PhD-Lost Tribes&DNA.
-ex LDS bishop scientist.
DNA.doesnt lie in court!