I'd suggest putting a note into the profile indicating that Methuselahs' age is "according to the Bible;" people can take it or leave it as they wish. Not everyone on this site is Jewish or Christian, and not all Christians take the Bible literally anyway. Certainly there are atheists and agnostics, Muslims, Hindus, Buddhists, etc. on Geni.com. We're not here to push worldviews!
This profile, like all of the profiles in the "Biblical Tree" try to be consistent to the Biblical sources. This tree is NOT supposed to be connected to the "main" tree, and we constantly cut the links that people insist on adding.
https://www.geni.com/projects/Biblical-Tree/38