Booth is just as legitimate an asasssin as any other. There is even growing proof that the Confederate Government ordered it. Which makes it even MORE legitimate.
You are skirting the issue, and avoiding the truth.
There is no proof that the confederate government ordered it. Booth was a man too cowardly to fight for his 'country' so turned to murder instead. His courage came not from patriotism but from brandy. At least other assassins like Charles Guiteau or Leon Czolgosz had the courage to look their victim in the eye before pulling the trigger. They didn't creep up and shoot someone in the back.