How is there a big difference? There was Arab immigration into Palestine. There was Jewish immigration into Palestine. all immigrants.
You didn't read my post. These so called Jewish immigrants did not match the definition of immigrants. They did, however, match the description of aliens or foreigners.
An immigrant moves to a country to be a part of that society. They want to be a member of the existing population.
The Zionists had no intention of being a part of Palestine. The Zionists imported settlers by the boatload to implement their colonial project. Theses settlers lived in colonies separate from anything and everything Palestinian. They were to be place holders on any land obtained by hook or by crook. They were to work and pay taxes. They would be conscripts in the military that would be necessary to create an exclusive Jewish state in a country where the vast majority of people were Muslims and Christians.
To call these settlers immigrants is a great misnomer.