Swizz Beatz not only wasn't offended, but he's kinda laughing off all the critics who were outraged on his behalf -- and he's telling them that their focus is in the wrong place ... rather than zoom in the hug-from-behind (from Usher to Alicia), SB says look at what they did!

He writes, "Y’all talking about the wrong damn thing !!! y’all don’t see that amazing dress covering the entire stadium ⚡️🚨😂😂😮‍💨😮‍💨😮‍💨😮‍💨 Tonight’s performance was nothing but amazing with 2 amazing Giants !"

Swizz went on to say ... "Congrats @usher and my love @aliciakeys that song is a classic 🤍 We don’t do negative vibes on this side we make history ✌🏽 Go see GIANTS at @brooklynmuseum it’s open until July blessings."

In other words ... he's not trippin', even though a lot of folks were.

ICYMI ... Usher's performance was buzzing heavy on social media for this particular moment -- namely, him wrapping up Alicia in his arms from behind as they sang their duet, 'My Boo.'

One notable person who commented on it -- boxing star Gervonta Davis ... who suggested he'd use his prizefighting skills to teach Usher a thing or two about boundaries. Boosie Badazz even got self-righteous and demanded Usher publicly apologize.

Indeed, there were some who were legit pissed. But even with those crying foul, you won't get what they're looking for here from Swizz ... he's telling everyone it's really NBD at all.

Cleary, he's comfortable in his relationship with Alicia -- they've been married for years now.

Still, Usher's PDA move caused quite a stir -- and some invoked Keke Palmer's husband to make their point.

Anyhoo, we broke the story on Alicia's SBLVIII cameo ... the two music megastars revamped their 2004 multi-platinum song -- recreating the hot/heavy vibes from the video.