likud

The Likud party he leads emerged from a terrorist organisation that conducted Hamas like massacres of the Palestinains.

It sounds like you might be saying Israelis who elected Likud (and the supporting parties) are not innocent.

By my understanding, Labor and Kadima accept that Palestine should exist as an independent state, and Likud do not.

This would make Likud unreasonable, but Likud does not represent all Israelis, nor is it fair to equate support for Israel's defense and continued existence with support for Likud's policies in particular.

Its charter states that Likud flatly opposes a two-states solution, and it wants to gain to Israel all land west of the Jordan.

Irgun is one of the direct predecessors to the Israeli Likud party, that has been part of most Israeli governments since th late 70's.

I think it's doubly unfortunate that both Hamas and Likud have managed to win various elections.

Ariel Sharon, Likud member and previous advocate of settlements everywhere.

This is almost certainly not the case, given that the Likud under-performed heavily in the last elections, and was outmaneuvered politically by it's three main coalition partners/rivals.

Imagine if Hamas went into Israel and arrested 400 people of the Likud party, killing 10 and demolishing homes, after being accused of killing innocent children without any evidence tying them to these crimes.

Sure, they only have several ministers in the government, Likud politicians show up at settler events, they keep changing the laws to be more in favor of settlers, etc etc...

By pure force of will, he withdrew Israel from Gaza (an absolutely wrenching move for Israel to make), and then left Likud to establish Kadimah so that he could move forward without blockage from the right wing radicals in his old party.

Meanwhile "from the river to the sea" was actual Likud's election slogan before Hamas co-opted it.

That is not the ruling Likud ideology in Israel nor the allied national religious ideology; both refer to Israel+Palestine+Golan as "the Whole Land of Israel".

Current government: Likud: its 1999 party platform states "The Jewish communities in Judea, Samaria, and Gaza are the realization of Zionist values.

"Palestine" is not recognized by anyone in the world so why should the Likud recognize it?

We may not agree, but under the point of view of the Likud, it makes perfect sense.

Likud government and charter explicitly calls for all land between the river and the sea to be for Jews.

Why would you believe this statement any more than a statement from Putin, Likud, Trump...