Some folks opt out of serving their country for "religious" reasons OR because they are rich privileged COWARDS. Right?

As to serving in the armed forces, what does secular history disclose about the attitude of early Christians?
“A careful review of all the information available goes to show that, until the time of Marcus Aurelius [Roman emperor from 161 to 180 C.E.], no Christian became a soldier; and no soldier, after becoming a Christian, remained in military service.”—The Rise of Christianity (London, 1947), E. W. Barnes, p. 333.
“We who were filled with war, and mutual slaughter, and every wickedness, have each through the whole earth changed our warlike weapons,—our swords into ploughshares, and our spears into implements of tillage,—and we cultivate piety, righteousness, philanthropy, faith, and hope, which we have from the Father Himself through Him who was crucified.”—Justin Martyr in “Dialogue With Trypho, a Jew” (2nd century C.E.), The Ante-Nicene Fathers (Grand Rapids, Mich.; reprint of 1885 Edinburgh edition), edited by A. Roberts and J. Donaldson, Vol. I, p. 254.
“They refused to take any active part in the civil administration or the military defence of the empire. . . . it was impossible that the Christians, without renouncing a more sacred duty, could assume the character of soldiers, of magistrates, or of princes.”—History of Christianity (New York, 1891), Edward Gibbon, pp. 162, 163.
What scriptures have always had a bearing on the attitude of true Christians toward involvement in political issues and activities?
John 17:16: “They are no part of the world, just as I [Jesus] am no part of the world.”
John 6:15: “Jesus, knowing they [the Jews] were about to come and seize him to make him king, withdrew again into the mountain all alone.” Later, he told the Roman governor: “My kingdom is no part of this world. If my kingdom were part of this world, my attendants would have fought that I should not be delivered up to the Jews. But, as it is, my kingdom is not from this source.”—John 18:36.
Jas. 4:4: “Adulteresses, do you not know that the friendship with the world is enmity with God? Whoever, therefore, wants to be a friend of the world is constituting himself an enemy of God.” (Why is the matter so serious? Because, as 1 John 5:19 says, “the whole world is lying in the power of the wicked one.” At John 14:30, Jesus referred to Satan as being “the ruler of the world.” So, no matter what worldly faction a person might support, under whose control would he really come?)
Regarding political involvement, what do secular historians report as being the attitude of those known as early Christians?
“Early Christianity was little understood and was regarded with little favor by those who ruled the pagan world. . . . Christians refused to share certain duties of Roman citizens. . . . They would not hold political office.”—On the Road to Civilization, A World History (Philadelphia, 1937), A. Heckel and J. Sigman, pp. 237, 238.
“The Christians stood aloof and distinct from the state, as a priestly and spiritual race, and Christianity seemed able to influence civil life only in that manner which, it must be confessed, is the purest, by practically endeavouring to instil more and more of holy feeling into the citizens of the state.”—The History of the Christian Religion and Church, During the Three First Centuries (New York, 1848), Augustus Neander, translated from German by H. J. Rose, p. 168.

That's why I asked for the context. The Christian Greek Scriptures are part of the Bible too. Christians are not under the Mosaic Law, but the Law of the Christ. The Jews were a theocratic Nation with Jehovah's backing. No Nation can claim that today. Christians are in almost every Nation today and Christians would not even consider going to war against Christians, or nobody else for that matter.