After introduction of Sachin, India also picked a big fan base in Bangladesh.
Afterall nobody wanted to support cows.
West indies also had some supporters. But by the time TV got popularity west indies declined
It is the cows who brought you to the test statuse..Otherwise, BD would be struggling to play any international cricket...At least Ireland and Afganistan are better team to be with Test status than BD..
Any way coming to the topic, it is just a matter of feeling good...When a nation does not have anything to proud of in the sports, then they just pick up something...It is same for BD...Because of the so called Umma concept( which is visible clearly).....they always choose Pakistan in cricket....That is another reason, also Indians always watch cricket....Because India does not have anything else to feel proud of too...