But it is a fair question to ask. Tesla Models S and X can use CHAdeMO DC FCs with a $450 adapter and they can use J1772 EVSEs w/their free included J1772 adapter. But, Leafs can't use Tesla Superchargers at all and can't use Tesla wall connectors without an adapter...
Nissan or their dealership proxies have every right to limit the use of the EVSE and CHadeMo they paid to install to whomever they see fit. And not uncommonly, they do just that. GM does the same.
CHadeMo or J1772 placed with public funds should be open to the public without discrimination. That includes LEAFs, and it includes Tesla cars. Use of public funds that excludes Tesla is unfair.
The Jdapter is using without permission EVSE paid for by Tesla, and by extension Tesla owners, for Tesla use.
This all strikes me as straightforward.