The statement about Palestinians being the majority of University of Haifa's students is not true. About 20% of the students are Arabs, from what I know (but I didn't find any formal numbers). The vast majority of those are Israeli citizens. There is a large minority in Israel of Arabs (about 20%). they usually define themselves as Palestinians, but they are still Israeli citizens. There are almost no citizens of the Palestinian Authority in Israeli universities, if there are any at all.
This doesn't change the actual point, that the universities are not Israel, of course.
One more thing, is the point of going through Israel. The Palestinian Authority have no international airport, Israel will probably not allow one to be opened in any case, but there might be other reasons. As a result, visitors will go either through the Israeli Ben-Gurion airport, or through Jordan. BG is closer, but you will have to go through Israel. This might be what the GP is referring to. The reason Israel won't allow an international airport is that it currently holds all the checkpoints, including the Alenby bridge on the Jordan border. This control is considered important to hold certain weapons, mainly missiles but also mortars, away from the Palestinian Territories. Such weapons would allow Palestinians to target the BG airport and the suburbs of Tel-Aviv.