The bible also says "Turn the other cheek", meaning that you should give people a second chance, and to treat them kindly despite their actions.
The bible has a ton of stuff in it, for example during times of slavery was used as a basis for both pro- and anti- slavery arguments. Drawing on a slogan from the bible to use its name as an authority is rather pointless - as a collection of aphorisms, there's one for every occasion.
Given that Eich has worked against the civil rights of gay people without explanation or apology
Eich expressed sorrow at the pain he caused in an article on his blog. He also stated in several different channels that the culture at Mozilla was going to remain diverse and inclusive. That's something of an explanation.
You seem determined to crucify a person based on one past bad action rather than the larger, more nuanced picture.