Just the optics of the US or EU doing business with a country that lobbed a nuke at a democracy (I'm assuming it's Pakistan that fires in this scenario because honestly that is the more likely first strike, India has a firmly stated policy of no first use).

The Pakistani system is considerably more fractured and much less under control with almost parallel systems of government between the military leaders and civilian leaders.

They are pretty much the worst case scenario after NK having nukes and in some ways worse, NK doesn't have an ongoing relationship with religious fundamentalists at every level.

Also, how practical is unprovokedly "raiding" a nuclear power that has shown a willingness to use nukes? Are you assuming the nukes get spent in one conflict? The stockpiles held by either probably suffices multiple wars.

On a side note, this agreement is likely all that keeps S. Korea, Japan, and Taiwan from deploying their own nuclear weapons.