He just explained to you that they did not willingly share the data.
Who did, did he provide a cite, or did he say it was an assumption?
When someone gets a warrant, approved by a judge, its been certified to not violate the 4th Amendment.
You may have a beef with the judge, but the person asking for the warrant did the correct thing and there is no scandal. When I was a prosecutor, I asked for warrants on behalf of police officers that were denied, it was not a scandal. Most of the time I asked for warrants, for much more intrusive searches than this, they were granted, when a warrant is granted the judge is saying "this search or seizure is reasonable under the 4th Amendment."
The forth does not protect against search and seizure, it protects against unreasonable search and seizure.