Because it was unnecessary, potentially illegal, put's his life and his family in jeopardy. Everything in the report was independently verified. The only reason to do this is to ruin a man's life for doing the right thing and reporting on something even his superiors agreed was credible.
You guys are just nuts.
Think of precedents - if we can't protect whistle blowers reporting on unethical conduct from our government - who will take the risk of reporting?
What is so weird is it's typically the RIGHT that takes the position of checks and balance on the government. Things have certainly changed.
He never saw anything wrong occur, he simply repeated a version of something someone told him. The fact that the FBI had already lied and falsified information to get warrants previously in the Russian Collussion investigation, warrants looking into the actions of all these people.
There also needs to be checks and balances on a certain segment of the intel-community that has been trying to take down a sitting president from the very beginning. When a President can be taken down by an unknown CIA operative based on second hand info, you have entered into a Soviet style of governing.
Except the President isn't being "taken down" by an unknown operative.
He reported, legally, what he had heard. The checks and balances lie in the IG who checks to make sure it is credible, not just malicious. If it is deemed credible, by law it must go to Congress to handle. There is nothing nefarious - the checks and balances are right there.
What you seem to be saying is that - despite the fact that what he reported has been independently corroborated - he shouldn't have done it.
So essentially - you are not allow to report on any wrong doing by the President if you are a whistle blower?