Islam wants the peace that comes from conquering all others and then crushing those within Islam who differ on even the tiniest detail from those in power or from those with car bombs.
Christianity wants the peace that comes from obeying God and from doing His will without unnecessary violence. As a Christian, I see our duty to God as supreme, of course, but that duty includes an obligation to forcefully stop Islamic terrorists from harming the innocent.
This situation is going to put a number of Christian (Christ-rooted) virtues to the test. Defensive acts are permitted to Christians though not always mandatory (spreading gospel takes precedence where it is applicable).
And speaking of this — evangelizing Islamic populations is going to take a steely determination and special supernatural blessing that is rare, if existent at all, today. However that is the only thing that can truly undermine the menace of jihadism, which is driven from hell not just from earth.