This is his biggest Merit in him been the President of India ... coming days Hindu Nationalist must not use this reason against making him the President... Advani has sacrificed a lot for Hindutva... while ABV was a silent leader, Advani's Rath Yatra and emotional use of Ram Janmabhoomi Movement are the sole reason BJP became a established party in many North Indian states and even Karnataka...
lately he became bitter due to constant defeats which was used well by congress, Planting mole's like Sudhindra Kulkarni... they targeted Top BJP leadership including ABV, Shushma everyone was secularised... Advani and company were thinking they were moderating BJP which could improve its election prospect...
Thankfull Modi took control before the disease became worse... We must also not forget it was Advani who was against the ABV decision to change Modi after Gujarat Riots...
I dont think he will take up a fight with Modi after becoming President, He is our eldest leader after ABV should not be considered a reward but a respect for his life long service for the cause of Hindutva...