Do we get to re-throw people, i.e., "RACISTS", who TRUMP illegally pardoned BACK IN PRISON once he is also in prison?

Nope.
If he pardoned them for federal crimes ... it was entirely legal.
There is no Constitutional limit on how a President can use their power to pardon, as long as it's a federal crime.

And once pardoned ... the whole "double jeopardy" thing comes into play.
You'd have to charge them with a separate crime.

You can if they re-offend.