Well, for the most part, these are people flying into Tel Aviv, Israel. ...but to answer your more general question: Since the most recent Arab invasion of Is

Well, for the most part, these are people flying into Tel Aviv, Israel. ...but to answer your more general question: Since the most recent Arab invasion of Israel, Israel controls all border crossings into the Palestinian territories - even though the Palestinian territories are self-governed. If Gaza and/or the West Bank were to sign a peace deal with Israel, then this would end. So I suppose the question is - Why aren't Gaza and the West Bank signing a peace agreement? The real answer is different for both of those entities. For Gaza, it's simple. Gaza is entirely run by Hamas, an Iranian funded terrorist group. And Iran has explicitly instructed them to never sign a peace deal with Israel. There aren't even any settlements in Gaza - nor Israeli military there. Moreover, the border is well established. The West Bank is far more complicated given settlements, division of Jerusalem, and water rights - but a deal was very nearly achieved in the last negotiations (all points were settled) but Arafat walked away from deal because he didn't want Israel to hold any portion of Jerusalem at all - even the portions inhabited entirely by Jews.