The key to it is to give what is due to whoever it is due and to be fair and just.

In my view politician can do this, and secondly USA have to change its policies towards Middle East.

I'm going to assume that by "Middle East Peace Process" you are referring to the ever pressing conflicts within the region and not primarily those of Afghanistan and Iraq. Peace in question I do not think can be settled as it must first be clarified that the states that exist today in this region are not traditional nor natural. When European colonials withdrew from the area they drew regional borders without consulting the native populations. As a consequence there are traditional claims and cultural as well as religious slashes between states there now as they attempt to clarify believed regional state lines. Religion use to be a major issue but it is no longer as most conflicts in the region are generally associated with territory. Only once the issue of state building is addressed and the issue of the border drawing re-addressed will there be a possible hope of a "peace" but do remember it is not just this region of the world at war, war is continuous and the West is as fixed in it as any other nation. One cannot change without the assistance and change of another.

So basically you want Israel gone and then there will be peace

My post actually suggests that the majority of states crafted in what we call the "Middle East" are manufactured and artificial. So, as a good example the current state of Israel is an arbitrary political line in the region, but to go further (and to avoid your assumption that I am advocating for the dismemberment of the Jewish State) Israel does not reside alone in this. The states of Iraq, Afghanistan, Saudi Arabia, Yemen, these are all good examples of states created by western design and without proper consultation of the inherent native population(s). In order to assess the situation carefully and impartially one must also accept the flaws of these states (yes, including Israel). These states offer up a consortium of different dialects, cultures, and religious foundations that are festering thanks to aggravated political and social policies. The Kurds in Turkey and Iraq wish significant autonomy and perhaps their own state - this in turn is acceptable under rights to self-determination (the basis of the USA, with the conclusion of WWI onward). Israel, too is at the edge of this argument so I will come to the point: if peace is to be expected and attainable within this perspective region of the world, the states residing there must be re-assessed and re-collected according to the popular opinion and populations residing there. So, clearly there will always be an Jewish State in Asia, but it is not likely to exist in the same physical space it does now today reside. It is likely, and expected that territories seized by Israel would, and should, be released in a sign of good faith to procure a better venue for peace talks. Furthermore, Israel should not be absorbed fully or completely as it would lend to the justification of an "adventurous" and "expansionist" state to continue absorbing weaker neighbours (as we have seen before). I hope that clarifies my statement.