The Oswald defenders here are remarkably like the hardcore Trump defenders. To each side their man can do no wrong, has done no wrong, and every claim that they did do something wrong is a lie or falsehood or made up by people out to get them. It's all an attack on their boy Lee or Donald (and don't you like how they refer to Oswald as "Lee"?). Oswald apologists: "Don't believe the government, don't believe the official story!" Trump supporters: "Don't believe the government, it's a deep state conspiracy!!"
Oswald apologists say dozens of different people, from members of the Dallas police department to the Warren Commission staffers to the FBI to even ordinary people like steamfitters and waitresses and cab drivers and on and on and on all lied. Or were coached. Or manipulated. Or well, sometimes it's not clear. Because defending Oswald means the ends justifies the means.
But they then turn around and mock the fanatical Trump supporters who do the exact same thing. As the saying goes, you can find anything on the internet.