It’s not either/or. There is no proof of spying — except of foreign nationals in communication w. Trump et al. Those are facts.
Another set of facts is the aids who passed on intel to Nunes. It’s good to report facts. It’s not good to rush to judgment.
Take Trump. No one yet has said he colluded w. Russia. But there are grounds for suspicion — sufficient to warrant investigation. No intelligent person will make an accusation until all the facts are in.