The advance of Islam, together with the other three horsemen of Revelation are events that God allows in order to expose the hubris of political and military power. The powerful nations of the world respond to these events by seizing immense political powers for themselves. By gorging on political power, they allow the Terrible Beast described in Revelation and Daniel to emerge.
The Roman Empire was not something odd. It was just a typical empire from that time, but more effective, more ruthless and more powerful than others. The Beast of Revelation will not be something different or unusual in its time. It will not be something totally new and different, like in the in the Left Behind series. The Beast will just be a very powerful nation that uses military, economic and political power to control events all over the world. It will gather an alliance of smaller nations to assist it accomplish its purposes.
Christians who understand what is happening will oppose the Beast, but they will not fight it with military or political power, because that would be playing into its strength, because in a political contest, power will always win. They will speak against it prophetically, and the response will be savage. Many Christians will be martyred for challenging the militaristic and political heart of the Beast.
These prophetic Christians will be among the martyrs John saw under the altar, crying out for justice, when the fifth seal was opened (Rev 6:9=11). The first four seals cause trouble that allows Beast to emerge. The opening of the fifth seal allows it to persecute Christians.
A state of Israel based on political and military power is not God’s purpose for his people. He wants Israel to export wisdom, peace and law (Is 2:2-4), not military hardware. The current militaristic state will have to be swept away before God’s purposes can be fulfilled.
The Israeli people who have chosen military and power for their salvation will get what they want. The Beast of Revelation, which is the ultimate political and military power will invade Israel, and they will get such a dose of extreme military and political power that they will hate it forever (Dan 11:13-16).
God has allowed ISIS to emerge in the Sunni areas of Iraq and Syria, so that the Beast will invade the Middle East. This will take a while to happen, but the identify of the Beast will be revealed, when it invades the Middle East to try and destroy ISIS. American Christians who want to send the marines in against ISIS, are implicitly wanting America to the Beast of Revelation.
Christians who are advocating military force against Iran and ISIS will find themselves operating as cheerleaders for the Beast as it emerges. They will find themselves operating as horned prophets, advocating their enemy and opposing the purposes of God. Many will get sucked into deception and will not realise until too late that they cannot escape.