Why do many scientists propose an illogical concept like “something comes out of nothing?”

From Mayur G:  

Even though many scientists, theoretical physicists (like Michio kaku, Stephen Hawking) have know rational answer as to how the universe came out of a big-bang out of nothing and Kaku also admitted that “when we scientists cannot explain something, when we want to say ‘I don’t know’ we take the shelter of singularity.” They actually have no clue as to where the singularity came from, or how it can exist, but still they like to believe that there may have been a singularity and it could have come out of nothing. Is this their “rascaldom”? Is this why Srila Praphupada called material scientists rascals? How can we refute this idea totally if anyone puts it before us? Is there an article by you which gives strong arguments as to how this singularity is bogus, kindly give me the link.