Jesus himself also told the Apostles he would visit others.
Muawiyah knows something the writer of the book of Hebrews did not know:
Hebrews 9:28 So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.
Two comings of Messiah. The second time it won't be to bring salvation, i.e., to die bearing the sins of the world, it will be for judgment.
Two comings of Messiah, with no coming in between.