Charles Amos, who used to be a town councillor in East Grinstead, said people should be free to marry and have children with “whoever they want”.
The segment on GB News was discussing calls from Conservative former minister Richard Holden for marriages between first cousins to be banned.
Mr Holden said such marriages have been linked to a higher rate of birth defects and can also “reinforce negative structures and control women”.
Existing legislation states the prohibited degrees of relationship for marriage include those to a sibling, parent or child, but not marriages between first cousins.
The motion to introduce the Bill to the House of Commons was approved without the need for a formal vote earlier this month.
Read more: Brighton i360 shutting and staff ‘won’t be paid’ – live updates
Mr Holden asked for his Bill to be considered at a second reading on January 17 next year, although it faces a battle to become law due to a lack of parliamentary time.
“I don’t think it’s wrong on every level,” said the writer.
“Individuals should be free to pursue their own good in their own way and that includes the freedom to marry and have children with whoever they want.”
When asked by Ms Cates if he would include siblings in that, Mr Amos said he would.
“I would include siblings in that,” he said.
“If you look at the number of birth defects among individuals that are father and daughter or brother and sister it’s about 57 per cent and although you might go oh that’s absolutely terrible I would note that those individuals wouldn’t exist at all if it weren’t for the marriages that created them so they’re no worse off.
“Sure the birth defects are bad relative to not having them but it’s better to have those birth defects and exist than to not exist at all.”
In 2020, Mr Amos was removed from the presidency of the King’s College London Conservative Association for making “insulting” comments on gender equality and racism.
Mr Amos was originally a prominent figure in Ukip’s youth wing Young Independence. In 2015 he was featured in a Channel 4 documentary as a 15-year-old activist for the party.
He was elected to East Grinstead Town Council in 2019 as a Conservative candidate.
But he was thrown out of the party months later after he objected to a Tory-backed council tax increase.
He called himself an independent Conservative.
