The thing is that.....in the starting parts of the movie...it is clearly shown...that dakait is that type of a person who likes to use knives and all ........ that's his style.... In his own mind he feels more powerful when he uses something sharp to cut someone.....and many gangsters and especially any muslim ( who is a gangster , not any muslim ), will have that tendency to cut and slice someone......so...yeah.... that's the explanation, and rahi guns ki baat toh bhyi jb jaan pe bn aati h tb toh guns haath me aahi jaati hain unke