I can see why they are angry. Their family members laid down their life for you, to keep your country free. Would you have rather all the men have simply watched Hitler take over during WW2? Unless men get up to defend their nation evil like that would have taken over.
Jesus took no issue with the centurion.
Matthew 8:8-10
8 The centurion replied, “Lord, I do not deserve to have you come under my roof. But just say the word, and my servant will be healed. 9 For I myself am a man under authority, with soldiers under me. I tell this one, ‘Go,’ and he goes; and that one, ‘Come,’ and he comes. I say to my servant, ‘Do this,’ and he does it.”
10 When Jesus heard this, he was amazed and said to those following him, “Truly I tell you, I have not found anyone in Israel with such great faith".
Does not sound like an issue was taken at self-defence
Luke 11:21-22
21 “When a strong man, fully armed, guards his own house, his possessions are safe. 22 But when someone stronger attacks and overpowers him, he takes away the armor in which the man trusted and divides up his plunder.
Good soldiers do this.
16. Psalm 82:4 “Rescue weak and needy people. Help them escape the power of wicked people.”
men don't always choose to go to war often they get drafted.
Romans 13
1 Let every soul be subject to the governing authorities. For there is no authority except from God, and the authorities that exist are appointed by God. 2 Therefore whoever resists the authority resists the ordinance of God, and those who resist will bring judgment on themselves.
You realize soldiers don't only go to war they also provide disaster relief and carry out peacekeeping missions.
God bless them.