Idk, I just know that under the new covenant nothing is considered unclean any more. It is possible that the purpose for considering those animals unclean was ultimately typological rather than a literal issue of cleanliness. In the old covenant they were not allowed to consume "unclean" animals just as they were not to mingle with foreigners, and in the new covenant nothing was considered unclean anymore, and the (believing) Jews were to be one with the gentile believers. There is a passage that shows this typology (in Acts 10) where Peter had a vision where he was told to partake of animals that he perceived as "unclean" and was told "What God hath cleansed, that call not thou common [unclean]." He then met with Cornelius at Caesarea, and there were many gentiles, "And he said unto them, Ye know how that it is an unlawful thing for a man that is a Jew to keep company, or come unto one of another nation; but God hath shewed me that I should not call any man common or unclean."
Idk, I just know that under the new covenant nothing is considered unclean any more. It is possible that the purpose for considering those animals unclean was ultimately typological rather than a literal issue of cleanliness. In the old covenant they were not allowed to consume "unclean" animals just as they were not to mingle with foreigners, and in the new covenant nothing was considered unclean anymore, and the (believing) Jews were to be one with the gentile believers. There is a passage that shows this typology (in Acts 10) where Peter had a vision where he was told to partake of animals that he perceived as "unclean" and was told "What God hath cleansed, that call not thou common [unclean]." He then met with Cornelius at Caesarea, and there were many gentiles, "And he said unto them, Ye know how that it is an unlawful thing for a man that is a Jew to keep company, or come unto one of another nation; but God hath shewed me that I should not call any man common or unclean."