Palestinians and their supporters burning a forest in the West Bank

And why would these 'Palestinians' and their supporters bother to set a forest on fire?
Dov Mark, land supervisor for the Gush Etzion Council, said such acts have taken place a number of times. "This is a known Palestinian method to take over state land," he said. "With the support of anarchists, who usually come from abroad, they come to an area of natural woodland which has never been cultivated, burn it on purpose and at the same time plant trees. It's all supposed to alter the reality on the ground."

Mark warned that "in this way, it's hard for the Israel Land Administration to work from the moment they plant trees on the land or cultivate it for agricultural crops. In today's case, some 80 dunams (20 acres) of natural woodland were burned by a group of 25 Palestinians and anarchists."
This type of activity is a symbol for the 'Palestinians' wishes generally: They don't want to build a state of their own. They want to destroy the Jewish state.