Sushma Swaraj have a point, try to read it. She didn't say Congress did it. She said, there is a conspiracy and surely there is. The Congress has taken away the tools like POTA from them where they can arrest terrorist before the crime happens.
Do you know that SIMI is represented by Salman Khurshid (Sonia’s left hand) in Supreme Court.
Why Congress, even after repeated terror attacks, don't enact or allow to enact anti-terror laws? Asked yourself and try to find the answer. Note, your day will come and you will cry over dead bodies of your mother, father, son, daughters, sisters, brothers, relatives. That day you will realise, what Jihadi-appeasing Congress is doing.