Airbnb IT Systems Engineer interview questions

Applied online and a recruiter got in touch with me. She later scheduled a phone interview to go over job roles and responsibilities. After couple of days she said hiring manager wanted to schedule a technical round with me. When hiring manager called he was rude and did not care about my work experience as I did not have any certifications. If the hiring manager knew he wanted someone with certifications then he shouldn't have shortlisted my resume for a technical round.