Claim

After Israel accepts the Two state solution there will be peace.

Fact

Well, Where to begin? I'll put in bullet points..

• There are currently around 2 million Arabs in Judea and Samaria. Including the Arabs in Israel, this means there is a 2/3 Jewish majority in Israel incl. Judea and Samaria. Also, Jewish birth rate is passing the Arab birth rate (see Israel's Demographic Miracle – Jewish Policy Center and Jewish, Arab fertility rates in Israel on par for first time). There are about 5 million "Palestinian refugees". Even if only half of those go live in Judea and Samaria this will more than double the number of Arabs which will be in this tiny strip of land. They will inevitably be poor, hostile, many will be supporters of Hamas, Al Qaeda, Al Nusra and other groups. they will disrupt the local Arab government and carry out attacks on Israel. Maybe even overthrow the local government like in Gaza.
• Since Israel will no longer be able to control the borders to “Palestine”, every able bodied Islamist now fighting in Syria, Yemen, Iraq and Afghanistan will come join the party.
• "Palestine" will be a poor failed state (partially because of the above reason) that will - like the any other Arab country in the Middle East (why should it be different?) - be a dictatorial and corrupt entity with fanatical Islamic elements, Gays will be killed (like in Gaza). Women killed (see honor killings) with infighting and terrorism pouring over to its neighbors. Since they are not really one nation but a collection of Arabs from the Middle East they will be as torn apart as Syria and Iraq which are made up of many Arab groups. (See minute 0:50 in following video)

https://www.youtube.com/watch?v=r1l5mRP_fzw

• Since (according to surveys) Most Palestinians won't accept Israel's existence under any circumstances (Hamas which has higher support than the currently ruling PLO in Judea and Samaria, Openly states it will not stop fighting until Israel is gone), there will inevitably be terror attacks against Israel. Israel's international airport is within arm launched rocket fire which means Israel will have no choice but to invade "Palestine" often to try to stop these attacks.
• Unlike Gaza, Judea and Samaria are literally inside Israel. Israel surrounds it from North, West and South. This means that almost the entirety of Israel and especially its economic center will be under constant rocket fire from a very long border. This is basically an indefensible border. Forget about the "demilitarized" clause everyone talks about. Arms will be pouring into "Palestine" before the Israeli soldiers have finished dismantling their bases. Israel left Lebanon and Gaza, both were immediately turned into launch bases for attacks against Israel.
• Ultimately, Israel will be condemned over and over at the UN and Security counsel for invading a sovereign country and using disproportionate force to stop these attacks (Just like when Israel tries to stop attack from Lebanon and Gaza). Israel will be even more isolated and support for BDS will soar. The same happened when Israel expelled thousands of Jews from Gaza and left it.
• Since now Israel has to contend with 5 million or more Arabs (and since they will be poor they will have a very high birth rate) instead of the 2 million it had before, it will be that much harder to defend itself. Jews will end up being a minority West of the Jordan.
• Up to now Israel had a legal leg to stand on since it was granted the land by the League of nations in 1922 and no matter what you may have heard, the UN cannot undo League of Nations laws (When the UN was created it agreed to maintain all LoN agreements). Only Israel can legally give away part of the country granted to it. But once Israel does that it cannot go back. No matter how bad this mistake turns out, Israel will never ever get back Judea and Samaria (legally). It will continue to live in a life and death struggle with Arabs living in the heart of its homeland. See Israel’s right to build homes is settled … under international law
• If you think an international force will help I simply point you to history. In 1967 Egypt told the UN force in Sinai to leave and it did so immediately See From Peace(keeping) to War: The United Nations and the Withdrawal of UNEF and FIRST UNITED NATIONS EMERGENCY FORCE (UNEF I). in 2006, UN resolution 1701 sent UN troops to Lebanon to stop arms from getting to Hezbollah. Today Hezbollah is one of the most powerful forces in Syria. Much more powerful than ever. See Hezbollah’s Multiple Violations of UN Resolution 1701. The International community will not sacrifice a single soldier to protect Israel. Assad has murdered hundreds of thousands (!) in Syria in just the past 5 years including the use of chemical weapons and the world does nothing. Will it really help Israel which it condemns every other week?
• Even if there is less than a 50% chance of the above happening (I think it is closer to 95% https://www.youtube.com/watch?v=5O-qdiZ9Wng ), This is a huge gamble for Israel. If it does happen Israel will cease to exist as we know it; a thriving Western democracy. It will be be in a constant struggle for its life. Skilled Israelis will leave to live in peace elsewhere and the economy will go down the drain with most of it spent on defense. A hateful world will look on as it realizes the two state solution was not such a great idea after all. Would you take that chance with your country?

Instead of the two state disaster maybe we should think of something else, like this:

https://www.youtube.com/watch?v=uIEeiDjdUuU

Source