I understand, but the type of teenager who makes so many your mom jokes at your expense you feel compelled to ask if they are homophobic for only targeting your mom and not your dad, would just say “yes 😎”.
People with enough self awareness to take the implication in jest wouldnt have been so obnoxious with the yo mama jokes in the first place.
It starts making sense when you keep in mind that these people dont necessarily want to kill all other ethnicities, just for them to get the fuck out. I believe most subscribe to the ideal scenario of ethnostates, whom might even be friendly towards another (as long as everyone stays where they belong).