Leo was wrong.
So, if the ordinary magisterial teaching, which Pope Leo XIII confirmed, which came to him from his predecessors, can be wrong, then certainly the current emphasis on "religious liberty," misinterprested by 99 % of all Catholics, could certainly be wrong.
In fact, my thesis is that this religious liberty, so-called, applies PRIMARILY to the Church's right to freely promulgate Her teachings, and has very little to do with false religions having the "freedom" to publicly promulgate their erroneous views.
No Sinky, if Leo and Pius and Gregory were wrong, then certainly Vatican II and your errant interpretation COULD be wrong, which we know cannot be.
Your theological speculation is waning, as usual...
Hahaha! Hey... could I adopt you as my Auntie Thesis?