Why are there so many calls for Sachin Tendulkar to retire?

Because, people tend to forget 'Form is temporary and Cl is permanent". If he hits a 100 in the next match, these selfsame people who said he should retire will be lauding him and will say he should play till he turns 50. Indians always forget about the past including what they themselves said & did, they only think about the present. Remember, not long ago he was the GOD.