What is the harm in not believing in God's existence ? [Spirituality & Religion]

Well, you'll probably go to hell if he actually exists, but as least you'll be in good company.

Same as not believing in Nessie.

Big difference. https://similarworlds.com/19-Spirituality-Religion/2831074-Is-it-safe-to-take-the-neutral-position-and-just

Depends on the country you live in. Some parts of the world are pretty hostile towards atheists

seems to have a major effect on religious judgmental hypocrites

Having freedom of thinking?
Depends who you ask.

Being harassed by believers.

I never got to go to an all-girl Catholic school with cute repressed lesbians. Smh

The strong possibility of becoming hopeless, of feeling pointless.

Hebrews 3:15

Being ostracized or bullied by those who [b]do[/b].

All those waisted mornings you could have slept in to go to church.