I actually don't know what you're talking about. The arena in Gliwice arena is bigger than Tel Aviv.
Suitable arenas (in terms of size) :
Gliwice Arena (13,000)
Atlas Arena, Łódź (13,000)
Tauron Arena, Kraków (22,000)
Spodek, Katowice (11,500)
Ergo Arena (Gdańsk, Sopot) (15,000)
Centennial Hall, Wrocław (10,000)
Toruń Arena (9,200)
These are just suitable indoor arenas being able to host events of 9,000 and more (which is suitable for Eurovision).
Even smaller venues uses for indoor football or other sport evens have a jigger capacity than 6,000.