Protestant and Biblical/Evangelical Christians aren't fighting this for one reason only, and that is because we are being faithful to the Will, and the Word, of God.
Jesus told us that even as the world hated and persecuted Him [becuse He was Light, and the world loves darkness], so they would persecute and hate those who follow Him.
He also told us that these persecutions and assaults on His faithful would escalate in the End Times, but that when we see this, we should not despair, but rejoice, for it is proof of both His Truth, and that His return is near.
So when Christians don't fight against that which God has predicted and allowed, don't think too harshly of us. Instead, study your Bible and get right with God.
Satan's time on earth is quckly running out. The end draws nigh. Rejoice.