javi, So, about Joost Klein disqualification from Eurovision, the Dutch broadcaster had released an explanation of what happened:
A camera operator kept filming Joost after repeat requests of stop filming him.
Joost ended making a "threatening gesture" captured on camera
The EBU disqualified him because of that.
And this is my own take: given how Klein had been pretty openly showing discomfort about Israel participation this year, it looks like they used a very small incident to blow it out of proportion and kick him out.