In Jainism, Krishna is not regarded as a jina (omniscient Tirthankar) or central spiritual teacher. Jain texts focus on the twenty-four Tirthankaras and on karma, rebirth, and liberation, rather than on Krishna as a divine being in the way Hindu traditions describe.

Regarding Narak (hell): Jain cosmology does describe various hell realms where souls suffer according to their karma. However, Jain scriptures do not identify Krishna as a resident or inhabitant of Narak in the Jain framework. The idea that “Krishna is in Narak” is not a standard Jain doctrinal statement.

If your parents are speaking from a Jain perspective, they may be emphasizing Jain teachings about karma and the fate of souls, rather than Hindu theological roles. If you want a precise Jain source on how Narak and karma are described in Jain scriptures, I can help locate a specific Jain text.

Note: I can only address Jain viewpoints here. If you want, I can provide more about how Jainism explains karma, rebirth, and liberation in simple terms.