American juriprudence is, in fact, *not* rife with people
being locked up for reasons that are as objectionable as
disobedience or "reunion ilicita".
In fact, I'm not even sure there *are* any reasons for
imprisonment as objectionable as those two.
It's true that there are many ugly features of America's legal
system, one of the most prominent of which is that "driving
while black" (or perhaps more accurately "breathing while
black") is still enough to get you stopped by a racist cop who
thinks you're in the wrong neighborhood. But who, even among
African Americans, would trade this for a system where the
corresponding crimes are "driving while opinionated" or
"breathing while disagreeing"?
If Leonard Peltier had been arrested in Cuba, the activists
fighting for his freedom would be in prison with him.
"Hurricane" Carter's appeal would never have been heard.
Geronimo Pratt's lawyers, who have freed their client and are
suing the D.A. and LAPD on his behalf, would be -- well, they
wouldn't be anything. He wouldn't have lawyers.
On top of that, each of these three miscarriages of justice
occurred decades ago; and since two of them have been recently
overturned, they say little about the *current* state of
America's legal system except that it's clearly much improved.
Your point about Amnesty is well taken; they report on America
just as they do on Cuba. The title link is to a page
containing the 1999 reports for the nations of the western
hemisphere. It's liable to be equally instructive whether you
think America's blameless or that we're not that much better
than Cuba.