In Jainism, kshatriyas exist as a social and historical class, not as a proof that war is spiritually approved.

A Jain understanding is:

• Kshatriya means one born into or serving the ruling and protecting class.
• In ancient India, kings had duties of state protection, justice, and defense.
• Because of this worldly role, some kshatriyas were involved in wars, battles, and governance.

But from the Jain point of view:

• Ahimsa is the highest principle.
• War is not spiritually praised in Jain dharma.
• Jain scriptures and history may describe kshatriya kings, but description is not endorsement.
• Even if a king fought in worldly life, Jainism teaches that violence binds karma, and liberation comes through non-violence, restraint, and detachment.

So the simple answer is:

Kshatriyas exist in Jainism as part of society and historical order, but Jain dharma does not accept war as ideal or spiritually pure. Their presence shows the reality of worldly life, while Jainism points toward renunciation of violence and the path of moksha.

If you want, I can also explain this from the Jain view of varna, kingly duty, and ahimsa in more detail.