You have a point, but the reminder has to be in the full throated proclamation of the gospel of Jesus Christ. Weapons are an ancillary part of the fight. It is the theology of Isalm that drives and justifies the jihadis and it is on that ground that it must be fought. As their suicide bombings underline their theology, so must Christians underline theirs by living lives demonstrative of the power of an indwelling and saving God. It is in this fashion that Islam can be repelled. There is also a side effect of bringing salvation and sanctification back to a lost and wandering United States.