IMO, this user's incivility was neither minor nor borderline, WP:BITE, WP:AGF, etc. Furthermore, incivility is incivility, regardless of its degree. As you felt it necessary to issue a warning to me, and in the interest of impartiality and maintaining a civil environment on Wikipedia, I think it would be proper to issue a warning to this user. Especially as this user instigated the incivility. You otherwise send a message that Wikipedia is a one-way street and that preferential treatment is given to certain users. Such a policy will no doubt lead to a breakdown of order and in rule enforcement. Thank you for your ongoing assistance,