Four Witnesses for Zina

Assalamu alaikum If a Muslim say that , it is not possible to bring four witness for Zina in this modern times as defined in Quran Surah Noor verse 13, this quranic requirement doesn’t have a ground and can’t be applied today. Does this mean that he denies / rejects the verse of Quran and its teaching ? Can we categorize this person as rejecting a part of Quran that is revealed to Prophet Muhammad and say it as an act of kuffar? Can I pray behind this person who say this Quran verses (24:13) is not possible for this time ?