Socrates provides only an argument from authority for his outrageous claim not only that the same are hostile to the same, but that most hostile are good people to good people. Even the argument from authority is problematic since Socrates deliberately misquotes two of the most famous lines of the poet Hesiod. We might almost suspect that he is looking for a reaction from his interlocutors.

Here I read through Platonic dialogues, translating and commenting on the Greek text as I go.

The resulting analyses may be found at:
https://theplatoparadigm.com

The full analyses include Euthyphro, Io, Hippias Minor, and Lysis, with extract/summaries from my books on Hippias Major, Meno, and Politeia (Republic)