Even though some people might think that about God’s actions in the OT, I don’t think that the muslims even try to portray their god as merciful.
I have found that the people who like to portray God in the OT as bad as Allah, generally have a bone to pick with God anyway, and it seems like they use that as an excuse to reject Him and justify it.
Just as you can’t throw all Protestants into one pot and make a general statement or all Catholics into one pot and make a general statement, I guess I disagree with your statement about all Muslims being evil. They aren’t. Many are peaceful and law-abiding.
I’m not a Muslim lover, because the jihadism that has occurred within their religion drives me nuts. I guess it’s the generalities that I sensed in your statements.