Felony fraud of a presidential election isn't something that happens "thousands of times, eveyday..."
Mr. Von Spakovsky never quite gets to why the judge was wrong and this wasn't a felony, he only argues that he doesn't think the FEC wouldn't have voted this to be a violation, although that isn't all that relevant since the FEC only deals with regulatory infractions of election law, it's actual courts that deal with felony election law violations, as was the case here.
There doesn't seem to be much gray area here; if money is spent for the purpose of helping someone get elected and it's not declared, then a crime has been committed, I've heard no arguments that this doesn't describe what happened.
From Fox News' Judge Napolitano:
""Unfortunately, the president wasn't in the courtroom, and the people who were, the federal prosecutors, who had a statement from David Pecker, the guy that owns the - National Enquirer said it was for the campaign, the prosecutors said it was for the campaign, Michael Cohen said it was for the campaign. The president wasn't there. Maybe he should have had lawyers there. So, if you make an honest mistake in failing to report something, or if you take $100,000 and you're only supposed to take $2,500, you can correct that by returning the money, paying a fine and correcting the report. If you do this as part of a scheme to hide it, then it's not a civil wrong, then it's a crime. That's what the judge found yesterday."