There are many scriptures that can be ripped out of their context to make a case against them. For example the Muslims especially make use of Psalm 137:9 Happy the one who takes and dashes your little ones against the rock!

If we read the Scripture in context and then go to other Scriptures and history we find its true meaning.

Psalm 137:8-9: “O daughter of Babylon, who are to be destroyed, happy the one who repays you as you have served us! Happy the one who takes and dashes your little ones against the rock!

God is not telling Israel to smash the heads of their infants against rocks. Israel was taken captive with their children by the Babylonians in several different invasions. 

God is pronouncing judgment upon Babylon for its great sin in showing no mercy when it destroyed Jerusalem and led the Jews captive. God is stating that Babylon will be dealt in the same manner that she treated Israel (according to prophecy). The day is coming when an enemy (will rejoice in its triumph over Babylon, and  will be happy in the Slaughter). It was the Medes and Persians that conquered Babylon. She was completely overtaken and ruined by these empires. And just as she rejoiced in destroying Jerusalem and Israel, God says her conquerors will rejoice in destroying her, including her innocent infants.

God is not commanding such barbaric behavior but stating what the future will be for Babylon.. This was a fulfillment of Isaiah 13:15-16: Everyone who is found will be thrust through, and everyone who is captured will fall by the sword. Their children also will be dashed to pieces before their eyes; their houses will be plundered and their wives ravished.”