DNC and the campaign paid a foreign spy in violation of the campaign finance laws interesting omission
The DNC didn't pay a foreign spy. The DNC paid a lawfirm. The lawfirm paid a US based research agency Fusion GPS. Fusion GPS hired a foreign born individual (an ex-spy) who did the research.
Also the Trump campaign hiring Cambridge Analytica, a British analytics firm.
Neither of those is illegal.
The DNC however, may have done a campaign violation in that their payment to the lawfirm was described as 'legal services', where more accurately it should have been described as 'legal and research services'.
They probably broke the spirit of the law - but it is far from clear that they broke the letter of the law.
I'm all for a change in law that would require much stricter and more transparent disclosures on this type of passthrough payment.
So the Democratic rebuttal has been released. A couple points. First, there's literally no way to reconcile Democratic claims of the dangers of releasing the Republican memo because it risked exposing investigative techniques that could harm the national interest, with the far far more specific memo the Democrats produced. It does seem, at this point, that such a claim was little more than a lie.
You keep misrepresenting what the Democrats said. They feared the chilling effect on individuals submitting leads and on FBI doing investigations.
As to them releasing detailed information - the harm to the nation of letting the false and misleading memo by Nunes stand is a pretty serious harm to the nation. Since Nunes already did the damage regarding people willing to submit information to the FBI there is very little in the way of additional harm by countering Nunes memo with fact that also does such disclosures.