You don't think any of it was "made up"?
This probably goes way over your head, but the best lie is the one that stays as close as possible to the truth.
So, no I don't think that "any of it" (whatever that means) was made up.
Physical evidence does not need to be made up when it can be manipulated in a highly circumstantial case like this one.
Let's see if you understand what I am trying to tell you. Marina said that Oswald wanted to get back together with her and she turned him down.
He then apparently gave her most of his money and left his wedding ring in a cup before leaving for the TSBD on Friday morning.
The benign explanation is that he understood his marriage was over but in a circumstantial case against him it suddenly becomes "evidence" that he killed Kennedy.
Can you explain to me why the circumstantial story has more merit than the benign explanation?