Perhaps you missed this tweet
@The Thriller posted earlier. Simply put, Congress has the constitutional granted right of oversight over the Executive branch of the federal government. It's part of our federal system of checks and balances. The SCOTUS can rule a Congressional passed law unconstitutional. The President can veto a Congressional passed law. The Congress can override a veto, etc., etc, etc. All these built in checks and balances are designed to prevent power accruing too much in one of the three branches.
In the case of impeachment, a right granted to Congress as part of the oversight "check" granted Congress by our Constitution, the president was not granted the right to say: "I'm so sorry, but Congress does not excercise oversight over me. I am above the law, and Congress cannot impeach me. I have spoken". If he could legally say such a thing, we would lose a president and gain an elective monarchy.
We are not an elective monarchy yet, and some of us believe we should act to prevent such a state of affairs. And, somehow, you chose to describe that as "hate". OK....