I think one of the reasons why most Pakistanis have an acceptance issue with Sachin is probably because its easier to digest Kohli being the bigger superstar in this era when Pakistan is going through a superstar shortage but Tendulkar pretty much held his own back in the day even when Pakistan had its own superstars in the 2 Ws, Akhtar, Anwar, Inzy, Yousuf etc.
I think that's something that's probably never gone down well with the Pakistanis.
Nothing else really explains the anomaly that while Kohli remains leagues below Tendulkar in the eyes of most non Pakistani neutrals, the Pakistanis are happy in putting Kohli, Dravid, Dhoni even Sehwag above Tendulkar at times.
The hatred for Tendulkar on Pakistani forums historically has been legendary and mind boggling.
There was a thread on this forum not too long ago when Tendulakr was about to retire, that said now is the time to accept Sachin is a legend of the game.

Like seriously?
I think more than Tendulkar's fictional issues with Pakistan its the large majority of the Pakistani fans online that have a lot of explaining to do wrt why the hate and nonacceptance for Tendulkar has been so high around here. Its small hearted, unsporstmanlike and downright disgraceful.