The adult son of Sen. Rand Paul (R-Ky.) launched a vile antisemitic and homophobic tirade at Rep. Mike Lawler (R-NY) at a DC bar Tuesday night, saying at one point that the Iran war was “about the gays and the Jews, and I hate them both, and I don’t care if they die.” In a phone conversation recounting the evening, Lawler told The Post that he was sitting at a popular DC bar with a friend and  a reporter for NOTUS , which first revealed the incident involving William Paul. William Paul is the son of Sen. Rand Paul (R-KY) REUTERS “So Rand Paul’s f—ing son is sitting next to us at the at the bar … And he just like chimes in on our conversation, f—ing drunk and belligerent, and then starts going off about, you know, if [Rep. Thomas] Massie [R-Ky.] loses [his primary], it’s because of my people,” Lawler recalled. “I’m like, ‘What people?’ He goes, ‘Jews,’ and I’m like, ‘Do you think I’m Jewish? … I’m Irish-Italian Catholic, buddy,’” the Hudson Valley lawmaker went on. William Hilton Paul. Paul, son of Sen.…