Not really how the sort of nukes we're talking about here work.

The amount of collateral damage to civilians would eclipse all the bad stuff ISIS have been responsible for. Read Barefoot Gen or the Hiroshima Diary but imagine them with 10x (+) more powerful bombs/larger areas.

Nuke innocents and turn much of the rest of the world against you.

Saying that there have been small tactical nukes but they don't offer an advantage over other big, not horrible radioactive explosives.

Donald, is that you?

You do know that the ISIS supporters that do western countries the most harm are already in our own countries, and so what you are suggesting is dropping the nukes on our own heads. That is the equivalent of shooting yourself in the head with a shotgun to cure your head lice problem!

And that is the simple argument before you talk about the nuclear fallout that would enter the atmosphere and spread right around the world contaminating and poisoning everything in the food supply, that means that if we did it and it worked...... we would safely walk down our streets without fear of isis, for as long as the cancer let us live for, and as far as our 3 legs and mutated deformed head would carry us.