Zoomers are members of Gen Z.

Alphas are members of Gen AA.

https://medium.com/bouncin-and-behavin-blogs/i-wish-zoom-had-been-around-when-i-was-a-teenager-9a1d9ba4c8bd

I'd say the difference between "poking fun" and "antagonism" is that "poking fun" would generally happen between people who feel comfortable enough with one another, personally, to give each other shit in a fun-loving way. Antagonism, by contrast, comes from a place of resentment and/or vitriol.