Israel believe that they are the natives of that land so have given the right to return for all Jewish people world wide.
The Palestians who were living there before Israel, think they are the natives and don't want to give up their homes and land.
Israel have cornered the Palestians and have them living in an open air prison where they have control of their food, water, electricity and aid.
Even though they have the majority of the land, Israel are running out of space for the Jews that wish to 'return' so slowly they have been taking the little land that the Palestians have left, have been evicting them and giving their homes to people who have recently arrived.
It is illegal, the UN agrees with it being illegal but nothing is happening to combat it.
If someone in Palestine commits a crime, the Israeli government will take the family home and either destroy it or give it to a settler. There are several resources and news articles you can read to verify the facts.
Any condemnation of what Israel are doing is met with claims of antisemitism and people saying that they are scared and that people want to see them eradicated. Even if you only stick to the facts around the illegal evictions.
People do not want to be labelled as racist, or worst antisemitic as it would be career destroying and it is seen as the ultimate form of bigotry. So they don't say anything and hope it all works out in the end.
When there is conflict the people in Israel are protected by the Israeli Defense League and many high tech military machinery. A lot of Israelis have international passports and right to live in other country's so will flee to other countries.
Palestians have no such right and are trapped awaiting there death by superior armed forces.
Over 100,000 IDF reservists have signed up to go into Gaza, there are pictures of there abandoned cars on the side of the road.
Its pretty obvious what's going to happen next.