There are caviats with pardons, that is the balance.
To accept a pardon is an admission of guilt for whatever crime involved. This has other consequences.
For instance, is manafort was pardoned, he could not be convicted of his crimes, but he would be admitting guilt, and could then be subpoena'd to testify against trump. And because he cannot be convicted, the 5th amendment no longer applies either.
The reason this particular pardon is beyond being questionable is the crime being pardoned. Sheriff racist was found in contempt of court, but what he was in contempt over was a court trying to force him to act within the constitution. His profiling had been deemed, in a court of law, unconstitutional.
What this particular pardon is doing is saying the constitution doesn't matter if you are mates with the president, and that's why legal people are having a fit everywhere.
And trump still calls himself and his followers, and sheriff racist, patriots. They are the opposite.
That si why even ryan is walking away, because this one is guaranteed to go to the supreme court at some point, and that will be a whole new shiteshow.