I think he should have stated it "because he might have committed a crime." The way I understood your position was that you thought there was enough evidence to initiate impeachment proceedings, though I did not think you meant that Trump should be impeached because of what he might do in the future. Regardless, it seems you might like any action which strikes a blow at his supporters.
Impeachment sends charges. There’s a trial afterwards to determine if the person in question actually is guilty of those charges. Am I wrong?