So if you were the outgoing president, and the incoming president said out loud in front of the nation he was going to abuse his power to jail your family members out of spite, you would just let that happen on principle?

Again, the threats were not levied just at family members, but only family members received the pardon. So let's not get all sanctimonious on this issue. If he was doing this as anything other than self preservation of his family we could talk, but actions speak louder than words and he chose family over principles.

Simply untrue. He pardoned hundreds of people, many of them with the same blanket pardon, and commuted the sentence of thousands.

Pardoning Hunter was also because he was technically guilty. They’d rather believe had something to pin on him.

If he’d pardoned a whole team of people he’d also signal to the world that he believe they are guilty too.

> only family members received the pardon.... If he was doing this as anything other than self preservation of his family we could talk

Seems like you should do some more research about this before forming such strong opinions, because you are not correct -- Biden preemptively pardoned more than just his family. He pardoned Fauci and Miley after Trump accused them of treason; as well as some members of the J6 committee like Liz Cheney (Trump retweeted a post that claimed Cheney was guilty of treason and should face a military tribunal).

I still think you should answer my question though, because it establishes a baseline for acceptability. I believe that you personally would pardon your own family against such threats because I believe most decent people would. So if you're willing to pardon your own family, then there's a conversation to be had about why you would need to, and whether that protection should be extended, for the good of the nation, to other people not related to you.

The problem we see right now with the pardon power was predicted by the founders:

  "The President of the United States has the unrestrained power of granting pardons for treason; he may pardon crimes which were advised by himself. It may happen, at some future day that he will establish a monarchy, and destroy the republic... If he has the power of granting pardons before indictment, or conviction, may he not stop inquiry and prevent detection?" - George Mason
And boy was he right! We are at that future day! So they saw this coming yet decided to include it anyway. Why?

Hamilton argued:

  "In seasons of insurrection or rebellion, there are often critical moments when a well-timed offer of pardon to insurgents... may restore the tranquillity of the commonwealth."

  "Humanity and good policy conspire to dictate that the benign prerogative of pardoning should be as little as possible fettered or embarrassed."
and

  "Without an easy access to exceptions in favor of unfortunate guilt, justice would wear a countenance too sanguinary and cruel."
They recognized the system might need a release valve, or would make mistakes, and they included the pardon power to correct them. They made it broad and "unfettered" as Hamilton put it because they expected the person who would exercise the power would be "prudent".

And in doing so they ensured that the pardon power reflects the soul of this nation. We get the government we vote for, and the pardon power is used in a way that we the voters tolerate.

The problem isn't the pardon power is broad, it's that we as an electorate are so willing to elect someone who is comfortable abusing those broad powers and other authority for his personal gain.

I will close by just noting that both of the abuses of the pardon power we are talking about were precipitated by Trump. Biden wouldn't have pardoned any of the people you're mad about if Trump hadn't first promised to abuse his power to persecute them. Biden had the good judgement and foresight to take Trump seriously, because he turned out to be 100% right.