Yeah, he seems really blunt, crass, and insensitive.
His vice says she's against calling it marriage, which does seem homophobic, but she says she's not bothered by the rights afforded by civil unions. This isn't the worst thing; she's not going campaigning against the right of gays to have their marriages/civil unions recognized by the government, at least.
Civil union is a legal figure (approved in 2002) that grants less rights than marriage. Same sex marriage was legalised in 2010. What she is proposing is taking a step backwards in terms of rights.
One doesn't have to personally like or agree with the choices of others. Being libertarian is about respecting another person's personal choices despite not liking them.
His vice did though: https://www.instagram.com/reel/Cv7Sy1aA8LL/