To accept these assertions, one has to accept the complainant's word uncritically. "Trust me" is not a productive statement from anyone in the government.
Well, him and Trumps ICIG:
As part of his determination that the urgent concern appeared credible, the Inspector General of the Intelligence Community determined that the Complainant had official and authorized access to the information and sources referenced in the Complainants Letter and Classified Appendix, including direct knowledge of certain alleged conduct, and that the Complainant has subject matter expertise related to much of the material information provided in the Complainants Letter and Classified Appendix. In short, the ICIG did not find that the Complainant could provide nothing more than second-hand or unsubstantiated assertions,