Michael J. Kok, The Gospel on the Margins: The Reception of Mark in the Second Century (Fortress Press, 2015), 136.
The Greek [of 1 Peter] is not the singular hindrance to Petrine authorship. It seems peculiar for the historical Cephas to address a predominantly non-Jewish audience and not broach the subject of Torah observance (cf. Gal 2:9-13) or ruminate on his personal memories of Jesus. John Elliot lists the spread of the Christ cult through Asia Minor (1 Pet 1:1), the post 70-use of Babylon as a cipher for Rome (1.1; cf. Rev 17-18), and the use of Χριστιανός as an insider designation to distinguish “Christians” from Israel and the surrounding populace (4:16; cf. Acts 11:26; 26:28) as demanding a date beyond the 60s and the lifetime of Cephas.