so that when Nassar attacked one of them she either stayed silent or maybe said something but wasn't believed, thus serving up 2 more daughters to this monster.

His attack was motivated by his own failures.

not one... but 3. How would anyone put another daughter into a program with a serial sexual abuser UNLESS the first one ( in this case first TWO ) stayed silent OR the father didn't believe them when they said something about what happened?

The only other explanation ( the first victim DID speak up and WAS believed ) is even worse.

I suppose it is possible that all 3 girls were in the program at the same time and were abused by Nassar on the same day or within a day or two of each other.

My girls would tell me exactly what happened as soon as it happened. How do I know? Because I raised them that way and they have told me about "incidents" ( not out and out abuse but questionable interactions - which allowed me to remove them from those situations )

I heard that there were parents who didn't believe their children and sent them back to the monster. This loss of trust is the worst you could do to your kid. But in this case, you are making very severe accusations without any proof.

B happens if and only if A happens.

B happened, therefore, A happened.

"Madison was much more emotional as she read her statement to the courtroom. “Like many other survivors, I was assaulted by Nassar and didn’t even know it,” she said.

https://www.huffingtonpost.com/entry/father-of-3-girls-abused-by-larry-nassar-attempts-to-attack-former-doctor-in-court_us_5a74724de4b01ce33eb22408?ncid=inblnkushpmg00000009

So I will go back to my original question, can you provide any link or report that this parent knew that he was sending his children to an abuser?

substantiation, not speculation, then your assessment is right.