At least if a US public authority decided to suspend his husband's account, he could issue a FOIA request to get the documentation explaining why it happened. I

At least if a US public authority decided to suspend his husband's account, he could issue a FOIA request to get the documentation explaining why it happened. If the FOIA is rejected for national security reasons, that'll be explicit. Public records laws and regulations don't apply to a big company like Google, so they can stonewall you forever and not have to explain what their policies are or how they were enforced. Public authorities are at least theoretically accountable to the public, unlike a billion-dollar megacorp which isn't accountable to any force on this planet.