Secure how bro...by telling exactly this only naa don't be friend with Muslim!
Don't get me wrong bro but think logically once, your sister and daughters will go to hostel , obviously muslim girls/boys will be there and again it's obvious you don't know their background/family , at that point this advice will come into picture in real life..the same person will create a separate group with other Hindu girls and will keep on spreading same hate to other groups...I am not saying trust anyone blindly but again it's obvious this will happen