Typically this is a Christian argument used against Islam - but I’m actually curious if this is seen as a valid argument from a secular point of view? (Even if it’s not the “best”)
Because essentially it’s “your holy book contradicts the holy book it claims to be endorsed by”, which personally I think I can see working on a secular level, even if you don’t actually believe in the Bible either.
spoiler
! Also, full disclosure: Yes, I am a Christian. !<
The problem is that you do hurt people by believing in untrue and harmful ideologies such as Christianity and Islam, both of which harm people, especially children.