The criminal act needs to be handled by the proper governmental authorities. Leaving it to the religious traditions opens the door to stoning and beheading by Islamists as an acceptable replacement for due process.
I think this was rhetorical.
Also, Judaism attempts to be a biblical religion. It may get things wrong (and more importantly the law can’t do squat to save a sinful soul), but it’s also not founded on a phony baloney text like the Koran.
And it would be moot anyhow. To stone the adulterer as prescribed in the Old Testament is not possible under secular law, so there’s no excuse not to invoke the more meaningful sanctions of secular law. If they don’t like the secular law then they ought to go to Israel (which as it turns out also does not wink at sexual abuse).