It is possible for a nice person to remain nice in spite of religion. But religion makes mass manipulation towards inhumane acts very easy. Religion can be substituted for nationalism in this regard.
A good test for religion is what an adherent does in the face of someone:
Mocking what they hold to be sacred
Leaving the faith
Or stating simple disagreement
A good test for religion is what an adherent does in the face of someone:
Mocking what they hold to be sacred
Leaving the faith
Or stating simple disagreement