I would go even further, and suggest to you that none of the SSPX priests have studied the sources, but instead endorsed the book based on the conclusion it reached.
Heh. And you would be blatantly wrong, as usual. Fr. Laisney expressly said he read every page of it.
I don't need to do your homework for you. I've read St. Robert many times, I know what the holy Doctor teaches, and it isn't what modern sedes think. Whether you know it or not, St. Alphonsus, Cardinal Billot, and yes, even Fr. Ballerini, are all of St. Robert's school only. I could cite you many eminent theologians like Cardinal Journet of John of St. Thomas' school, but I don't need to. You want to prove something, you bear the burden of proof. I don't need to, and I'm not going to do so here since its not the thread topic anyway.
I would only advise you to read why St. Robert rejects the second opinion more carefully before you presume to state St. Robert would have agreed with this person or that person. St. Robert taught the Pope is not removed from God, except through the action of men. Thus, the action of the men of the Church to determine the Pope's public pertinacity in heresy, i.e. to determine that the Pope is manifestly obstinate, is absolutely necessary. That is the true opinion of St. Robert. Read up and you will see.