I agree that the above passage are in the Quran, and that they are horrible . . . just as we have equally horrific passages in The Bible.
I have read the Quran, Bible, Baghavad Gita, The Book of Mormon, the Guru Granth Sahib, and so forth as a form of self-education and to satisfy my curiosity.
Just because I read a religious text with an open mind (and as a self-styled scholar) doesn’t mean that I buy into it . . . any more than an anthropologist who insinuates himself into a tribe of aboriginies from Papua New Guinea believes in cannibalism.