if a jain is not willing to join the army and save its own humankind from external threats arising due to moral turpitude of others, why should they be saved at the cost of lives of non-jainas?

In Jain Dharma, saving lives is valued, but never by committing himsā on others.

A Jain who does not join the army is following the principle of ahiṃsā and the vow to avoid intentional violence. But that does not mean a Jain believes that the lives of non-Jains should be sacrificed for Jain safety. Jain ethics do not support the idea that one group’s lives are worth less than another’s.

Key points:

• All jīvas are equal in their capacity for pain, fear, and spiritual progress.
• Intentional killing is wrong, even if done in the name of protection.
• A Jain should try to protect life through nonviolent means: mediation, shelter, warning others, service, restraint, and courage without hatred.
• If violence is used, Jain thought generally treats it as a grave karmic burden, even when done with a protective motive.

So the Jain answer is:

• A Jain should not ask others to die for him.
• A Jain should also not accept that his own safety requires the killing of others.
• The proper Jain path is to seek protection without himsā, and if that is not possible, to remain as nonviolent as circumstances allow.

In short: Jain Dharma does not justify saving one community at the cost of another’s lives. It teaches reverence for all life, not selective compassion.