The CV themselves gave us a clue when in the car Suraj asked if he is a coward for running away like that and Shikhu answered him that he is no coward. Is just like in that game where you just backed off a little to let the enemy enter.
And about his father, I am sure he didn't try to kill him. Ever since he was a child Suraj cared about every member of his family. He may not have shown it but it was clear from his few scenes he had that he cared and a lot. He also told Chakor recently how much his family means to him.
Secondly, he is no murder. He never killed anyone in his life, let alone his own father. He was barking about being cruel but he never was a killer. Plus his anger is short and he doesn't have hate enough inside of him to carry on such an action. When he married Chakor he said he will do this and that to her. And what did he do a couple of hours later? He slept outside of his own room because his new wife, in her anger, threw him out of there. This is an example of how short his anger actually is. The same with Imli, after scolding her, he needed to buy her chocolate because he couldn't bare the guilt.