Apparently you have not fully studied the Bible. What does a government's decision to go to war have to do with Christianity? For a man who finds Islam attractive I find your reference to wars fought by Christians out to defend our freedoms as bit odd since Islam has instigated wars to force conversions since its inception.
Anyway back to the Bible:
Matthew 22:17-22
17 "Tell us therefore, what do You think? Is it lawful to give a poll-tax to Caesar, or not?" 18 But Jesus perceived their malice, and said, "Why are you testing Me, you hypocrites? 19 "Show Me the coin used for the poll-tax." And they brought Him a denarius. 20 And He said to them, "Whose likeness and inscription is this?" 21 They said to Him, "Caesar's." Then He said to them, "Then render to Caesar the things that are Caesar's; and to God the things that are God's." 22 And hearing this, they marveled, and leaving Him, they went away. NAS
Romans 13:1-7
13:1 Let every person be in subjection to the governing authorities. For there is no authority except from God, and those which exist are established by God. 2 Therefore he who resists authority has opposed the ordinance of God; and they who have opposed will receive condemnation upon themselves. 3 For rulers are not a cause of fear for good behavior, but for evil. Do you want to have no fear of authority? Do what is good, and you will have praise from the same; 4 for it is a minister of God to you for good. But if you do what is evil, be afraid; for it does not bear the sword for nothing; for it is a minister of God, an avenger who brings wrath upon the one who practices evil. 5 Wherefore it is necessary to be in subjection, not only because of wrath, but also for conscience' sake. 6 For because of this you also pay taxes, for rulers are servants of God, devoting themselves to this very thing. 7 Render to all what is due them: tax to whom tax is due; custom to whom custom; fear to whom fear; honor to whom honor. NAS
Our physical life is under the control of secular governments, our spiritual life should be under the control of the Holy Spirit.