Meh. They intentionally walked the guy in front of him to put a runner in scoring position. That’s equally disrespectful. And, I’m wading into the muddy waters of unwritten rules, but:
If you’ve just been disrespected, I feel like you’re justified in rubbing your success in the other teams face.

When you intentionally walk a batter and the next batter hits a homerun, yeah that guy is going flip the fucking bat and enjoy it, because by not pitching to the hitter ahead of him, you are declaring him to be a shitty hitter. And a hitter will almost always take offense to that.