Keep on believing that. Just like Hillary didn’t use her portable device to send/receive emails (that by nature would have been a wireless method).
And a VPN connection is well within the normal capabilities of an iPad, so the “wireless” aspect is somewhat of a moot point (though I won’t argue it is all that secure).
Classified Networks do not connect to the outside world. You can’t VPN into them. They don’t have wireless access points. An IPAD would not and would never be connected to a classified network, period even if they used a hardline connection.
Clinton’s emails were an unauthorized and unsecure connection to the State Department’s unclassified network. While the emails did contain classified material, the material was not native to the network. It was likely transferred from a classified network, stripped of it’s marking, and sent to her email.