Based on that experience, I can tell you 100% for certain that what we happened Saturday is not normal Secret Service behavior.
Hysterical story in retrospect, but I can attest to the fact that they are VERY proactive when they feel they have a security threat to a President or a VP. And they were totally out of line in my case while this guy was about as legit a threat as they come.
A perfectly rational explanation for this is willful withholding of adequate security by the Biden Admin in hopes of an assassination combined with a passive aggressive "let it happen" mindset on the part of newly rotated in members of the security command team with Peter Strozk style TDS and "get Trump" mindset.
The security people did their jobs right up until they were either instructed to stand down and not to take action or they were left hanging with no instructions. .
A friend of mine is a news photographer. He went on the roof of a DC hotel to get a high angle picture of the White House. Within 5 minutes the SS was on the hotel roof, confronting him. He showed them press credentials and they left him alone.