@Greatest I am cv,
OT's G-d is a piece of land - Palestine.
NT's God is a human who was, supposedly, hanged for the sins of his followers.
Islam's Allah is All Merciful. He does only good. He gave rationality, brain and guidance to the humans - now, if the human produce clamities as result of their evil deeds on Earth - they should not blame their Creator for those clamities.