In Baahubali 2 : The Conclusion, Amarendra Bahubali was killed by Kattappa as ordered by Rajamata because she thought he trying to kill the King.
Then after realising the truth, Rajamata Shivagami Devi announced Mahendra Bahubali(the baby) as the king.
Then Bijjaladeva asked his men to kill Rajamata and Mahendra Bahubali(The King).
The same crime that raised against Bahubali (Tried to kill the king).
Then why Kattappa never tried to kill Bhallaladeva or Bijjaladeva in the 25 years?