How I like to think God would punish religious groups in the afterlife

JEWS

Jews subject to the 36 capital offences of Judaism would be subject to them in the afterlife. There are four methods: beheading, burning, stoning and strangulation. Once these death penalties are discharged, they are reincarnated as gentiles or Jews according to their preference.

If Jews think this is too harsh, they can always convert to Islam. 

MUSLIMS

Muslims who don't go to hell get to heaven.

CHRISTIANS

Christians would all go to hell because Christianity is ipso facto idolatry and blasphemy, but the good news is that there are actually very few confirmed Christians and Christianity is virtually extinct in the West.

ATHEISTS, AGNOSTICS AND NIHILISTS

This leaves atheists and agnostics who would be punished according to the Noahide laws they broke.

HINDUS AND BUDDHISTS

Hindus and Buddhists are already subject to the rules of reincarnation.