In Jain tradition, the Yādava clan of Shri Krishna was destroyed mainly through mutual conflict, intoxication, and the rise of karma brought on by a curse. After the curse of sages, the Yādavas gathered at Prabhāsa and became quarrelsome. In anger and intoxication, they attacked one another, and the clan was wiped out by its own hands.

So, in Jain accounts, their destruction was not by an outside enemy, but by internal strife and the fruition of past karma.

If you want, I can also give the Jain version of Krishna’s final life and the end of Dwarka.