Experienced, competent, and capable men make mistakes all the time. Expert witnesses have mismanaged trial appearances and turned a jury against them. Professional skydivers have fumbled maneuvers. Beloved animal specialists have made mistakes while handling wild animals. All have resulted in tragic ends. That's not fate nerfing humanity. Humans are flawed beings. Spider-Man was hacked off by all the corpses and underestimated Tombstone because the mobster is dumb.
Tombstone's false flag operation targets Rose because he blasted the albino gangster for Spider-Man's prying. I doubt Tombstone has thought beyond pettiness and teaching people a lesson, but vigilantes would apprehend Rose because he's a wanted man. If Rose can't cope, the plot proves to Rose and the other bosses that the upstart is all mouth. Whether that's his objective, I don't know, but I'm just speaking objectively. The strategy wouldn't stand up to sustained scrutiny, and Tombstone's one-track mind only considers the present, so the scheme hasn't surpassed the limits of Tombstone's keikaku class. Even teens have been implicated in deaths instigated by a similar act of harassment known as swatting" (making a fake emergency call to sic the police on someone). I think Zeb Wells does a fair job portraying Tombstone as a menace despite his low intelligence.
Spider-Man's constraints need more explanation next issue, but Tombstone's gang had caches from other villains, so an answer might be forthcoming. Understandably, fans are irritated by what will surely be a close shave for Spider-Man during an anniversary year. I don't think Tombstone's story is offensive yet, but others are welcome to disagree.
I feel too much is up to interpretation since we never hear what MJ says.
Example:
Paul: Do I seem like a violent guy?
MJ: This from the adult male who wanted to punch Hans of the Southern Isles in the face for betraying Anna of Arendelle when we watched Frozen last night?
Paul: Okay, but he deserved it.
MJ: He's a Disney villain! *joking* If that's what you'd do to a fictional teenager, who knows what you'll do in real life.
Paul: I promise we're just gonna talk!
MJ: What? Are you not even going to defend yourself, scary man.
Paul: *pouting* I'm here.
MJ: Don’t think I didn’t notice you dodging the question, mister. *starts laughing*
Paul: *amused* I love you too. *hangs up*
MJ: *abruptly stops laughing*
I assume the action implicated another in-universe person, but we don't know the details. I think it's a joke, too, but it might serve as foreshadowing. I want Paul to be respectable because it might result in lazy writing if he isn't, but it's not any reader's fault if they feel Zeb Wells hasn't earned their goodwill. Paul might not remember some act of violence he committed. For a witness or victim, his abuse was noteworthy, but for the abuser, it happens so often that it's become insignificant to him.
Prowl from Transformers is a great example.