Some of them actually do.
No one is asking non-Muslims to believe what Muslims believe, mate. It's just that we all have our beliefs and we choose to follow them, there's nothing like imposing it on others, I don't see why you raised this point anyway..
I brought up that point because you are trying to prove that Ghazwa e hind is "real" based on hadiths that many of us don't believe in. Actually , even if ghazwa e hind was listed in other religious texts , i still wouldn't believe it since i'm atheist and don't believe that anyone can predict the future.