Agreed... the whole conversation reads like parody: self-centred and inane recruiter pitch followed by smug, obtuse developer reply followed by recruiter amusingly taking umbrage at the reply and still trying to pitch the job.
Using words such as "recommend", "advice", "friendly" in my mind conveys only transparency. I would genuinely like to know how this email could be re-written in a more helpful tone. Or is any response doomed to snarkiness?
As its written, you just seem like you're dismissive and passive aggressive. If you had actually responded to the email and then added an aside about his email subject it would have come across much differently.
1) Email headers in all caps don't get seen by me.
2) I saw your email.
So, of course, the recruiter switches from spam-intake mode to "just cut the crap and tell me if you're interested or not, since you are responding". His job is to feed the hopper with resumes.