I know and am convinced by personal revelation from the Lord Jesus that there is nothing wrong with eating any food. But to the one who considers it to be unclean, it is unacceptable.
For the unbelieving husband has been made holy by his believing wife. And the unbelieving wife has been made holy by her believing husband by virtue of his or her sacred union to a believer. Otherwise, the children from this union would be unclean, but in fact, they are holy.