For one, your map assumes there was once a Palestinian state. There wasn’t, not ever. The land was part of the Ottoman Empire. Once the Ottoman Empire collapsed no state or country owned the land. Another point is your map doesn’t mention land bought from Palestinians as much of it was.

Spreading false information like this only miseducates people on a conflict that demands accuracy. It’s false information like this that creates an undeserved animosity towards Israel. Misinformation only adds to hurdle of reaching peace. Please, next time research your information properly.

http://www.thetower.org/article/the-mendacious-maps-of-palestinian-loss/
https://www.economist.com/blogs/democracyinamerica/2010/03/israel_and_palestine_0