As is well known Cypriots are becoming concerned at the increasing numbers of Israelis settling there.

According to this Thai YouTuber something similar seems to be happening on Ko Phangan, with house prices escalating way beyond the reach of young couples, and exclusion of locals from areas of land previously considered communal :

https://youtu.be/akpcWNb45ao

This is something that can happen anywhere, even with migration - or purchase of secondary residences ("holiday homes") - within a nation's borders by its own nationals working in a high-income area.

In an area, typically rural, that has suffered from depopulation, outsiders purchasing abandoned properties, sometimes ruins, doing them up, and then living there or renting them out, can provide a boost to a depressed local economy. Firstly by providing money to poor farmers and work to local builders and craftsmen, and secondly to the retail market. But beyond a certain point, the benefits turn negative. This is particularly true when tightly-closed colonies are formed within the host community.

I saw this in the Dordogne region of France where in the 1970s foreign and 'Parisian' buyers were welcomed. In later decades, discontent amongst locals was expressed by bombs exploding outside estate agents' shops.

In regions such as the foothills of the Pyrenees, which at one time tended to attract younger buyers, a rise in the child population helped to prevent village primary schools from closing.

Would be interesting to hear comments from any familiar with Ko Phangan.

No it´s not! It´s a drug infested party island

I went last year to study sound bathing and try to meet hippie white women

It did not seem particularly overrun with Israeli people. It seemed very mixed, at least on Zen Beach.

But they are a bit of a presence owning weed bars on the main drag of Koh Samui.

I am told that ownership of these bars changes regularly since it’s hard to make any money out of them with so many weed shops close to each other.