wtf is this new trend?somebody halpp

So..i been seeing many of this new meme or racism idk how to describe it , its filled in my fyp
Can someone tell me what these means--Yea all of these are against kerala for that joke jaspreet made in igl

"idli dosa vada"- tff..Idli and vada is a tamil nadu thing and most malayalies hate idli and vada , including me

Aree maraa jayeegaa 🤙"- like tf...what does it even mean , that sign people do are frm tamil nadu..not kerala. we dont do that "pullingo" stuff

Yea jokes and rasicm are cool, we all troll eachother, but atleast use some real reff , which some of the victms get triggered..THE VICTIMS OF RASICM CANT UNDERSTAND IT..
so can anyone tell me the lore behind these stuff
(also no hate to tn, its a great place)