The other side feels all that is in play and needs to be decided. Are you asking me to find links them basically saying that?
Let's go through this slowly. Fact #1: Can you name another country that didn't decide on its own capital city and had its capital city decided for them by another nation? You can't.
Fact #2: Israel calls Jerusalem its capital city.
Fact #3: Even according to the UN, or any international guidelines for a two state solution, Israel maintains sovereignty over West Jerusalem.
Now we know from fact #1 that "the other side" doesn't get a say in fact #2. If you want to say that they do, you obviously don't agree on fact #3. What else could that mean other than that you want a One State Solution (Israel gets wiped off the map)?