FYI:
I'm an ISKCON devotee, and I KNOW THESE THINGS BY HEART.
TRUST my answer.
Answer:
The values expressed is that a warrior (kshatriya), should protect it's nation even though that person might have to give up their life. From the bhagavad gita, it expresses, that Even if you have to kill your own family members, still you have to protect your nation, and it doesn't even matter to have a bad family member.
Step-by-step explanation: