Let me explain something to you. The California Unruh Act prohibits businesses from discriminating against people based on their citizenship status. If they got across the border and established proof of age, they had every right to beat your kid’s team regardless of whether they learned English to your satisfaction, and regardless of how much it allegedly cost Bob to get them here. CalSouth is never going to stop Bob from helping kids play soccer here because it can’t. And the State of California has decided it shouldn’t.
I have three points in response to your claim that they don’t have appropriate transfer paperwork. First, it looks like this requirement only applies when a player was previously registered to a another club.
https://www.ussoccer.com/about/federation-services/intl-clearance/itc-request. If they weren’t previously registered, which most Brazilian kids aren’t, no foreign approval is required. Second, I don’t see any proof they didn’t complete paperwork, and I am certainly not going to take the word of a jilted former FCGS parent. Third, you look like a sore loser regardless because you’re relying on an paperwork violation as an excuse for the fact that your kid’s team wasn’t good enough.
Videotaping someone else’s soccer game because you hope your nemesis will assault a referee also seems like perhaps not the best way to spend the weekend. You should consider doing something nice with your family instead. Maybe a picnic. Maybe watch a City of God. Great movie.