Judge Chutkan's ruling is based on common sense, as the public has a right to know everything about a presidential candidate's potential criminal history before an election. What makes this news so alarming, however, is the reaction from the Trump campaign. If the former president truly believes he did nothing wrong, then he should welcome this document release with open arms.
The reason Trump is against this is not about guilt but rather following the DOJ's policy of releasing information at least 60 days before an election. As for the details of Smith's investigation, all they've shown so far is that some people decided not to follow Trump's request that everyone protest peacefully. This is a bad-faith attempt at an "October surprise."