DNAs of Religions
Muhammad fought his enemies with his troops, using weapons. Muhammad also attacked some Judaist communities who did not respect him. Muhammad believed that God was on his side since he was winning the battles.
This is part of DNA of Islam, whereas peaceful preaching became part of DNA of Christianity.
God also helped Hebrews through various wars establish their nation. Accordingly, Islam's relationship with God seems rather closer to that of Judaism than that of Christianity.
Indeed the Koran is full of curses against enemies of God, Islam, and Muslims. In this context, Islam is not a religion of peace. However, Satan can abuse these curses so that he would make righteous Muslims get attacked due to false accusation. Yet, if followers of Satan are going to occupy Muslims, it may be reasonable for the Koran to give such strong warning to Muslim readers with such strong curses on these enemies of God, Islam, and Muslims. Nonetheless, the Koran is not a book for peace in a Christian sense.
And, in any of these religions, it is believed that God will punish people on the last day or in the last judgment.
Of course, it is reasonable that God takes a hard stance against Satan in the showdown. But does it mean that there are so many followers of Satan among human beings?
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Mat 7:2 For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.