that stage scene was not that rude,it happens millions of time especially that day was the first day fally saw him because he was recruited while fally was in europe lol even werra sometimes asked guys who were recruited long ago in the group " what's your name again?" because he was not used to them at all
after that they were quite close and fabregas became the group's fourth atalaku behind kasangidi equaliseur and fally's cousin boussole and a back up in the singing section aswell and even not too long ago fabregas wished fally happy birthday on twitter,what happened between them apparently is that fabregas had been encouraged to make fally a rival as you do not become a big star without rival as they think,so fabregas had been throwing shots towards fally for over a year now and apparently they met at studio and fabregas wanted to salute fally who rejected it since he heard about the attacks and fally with his al pacino love thing says "i'd rather an enemy than a traitor" and from then the beef became public and people around him who pushed him towards beef had a tactic to fuel it in saying whatever went wrong for him was due to fally,ya mado censored,short crowds at concert and so on
this situation reminds me of wazekwa and karmapa back in the days with karmapa influenced by people to create a rivalry
not saying fally is a saint at all,but most of that beef is made up by people around in their innerself they respect each other and fabregas even used to say clearly that fally was a role model for him,and you'll notice that his language has calmed down a lot since that famous tv rant backfired on his image