"Against"?
The Act states "it shall not be lawful to employ any part of the Army of the United States, as a posse comitatus, or otherwise, for the purpose of executing the laws."
Even if the NSA were a part of the Army - which it is not - collecting data is not "executing the laws."
Nor apparently the 4th Amendment, in your mind anyway.
Or were you going for since unwarranted mass searches and seizures are illegal, doing them isn't technically enforcing the law?
BTW, why didn't you quote
10 U.S.C. § 375. Restriction on direct participation by military personnelWas that because you said "Its current director is an Army general, but his predecessor was Air Force."?The Secretary of Defense shall prescribe such regulations as may be necessary to ensure that any activity (including the provision of any equipment or facility or the assignment or detail of any personnel) under this chapter does not include or permit direct participation by a member of the Army, Navy, Air Force, or Marine Corps in a search, seizure, arrest, or other similar activity unless participation in such activity by such member is otherwise authorized by law.
What "law" supports the violation of the 4th Amendment? The cyber-invasion without justifiable cause of the property of US Citizenry is ILLEGAL.