If there are no consequences whatsoever for the lawfare engaged in by the left, they'll just be emboldened to do it again the next time they have power. Expose it all, prosecute where there is criminal activity found. Do it openly and transparently for all to see the evidence.
Furthermore, when N.G.O.'s and bad-actor activists are found to have participated (like the slimeball connected to the Soros foundation who has been discovered to have taken part in the Russiagate Hoax), go after them, as well. The only way this nonsense will stop is if both sides understand that there are consequences.