LOL.You the creator of the thread doesn't get it even after reading the manga. Madara was the real one who got stab in the back due to him unable to use sharingan because of chakra he didn't have left.
Madara black zetsu was made from madara however, white zetsu was made from hashirama dna.
White zetsu is a special clone meaning even if you hit it with brute force, it will still be there whereas the black zetsu doesn't have that ability without connected to white zetsu. Madara didn't escape but was stabbed and it wasn't a genjutsu that hashirama was in when he stabbed madara and if it was a clone then the clone would have puff away. only the white zetsu who is a special clone that doesn't puff away. Hashirama is a genjutsu master, taijutsu and ninjutsu as well and the only explanation that can explan how madara survive is after hashi left, someone save him or he didn't die due to his will. Nothing more or less.
You've got it all wrong. Wait till next week because it is a genjutsu. The possibility of the zetsu clone that switched in is impossible because he made the zetsu from some mokuton combined with the gedo mazo which he didn't have at the time of their fight. You shouldn't criticize others when you are talking sh*t yourself.