Case closed, those patterns couldn't be any clearer.
On this particular occasion, EBU did everything right - any other course of action would have resulted in a lot higher potential for a scandal directly during the liveshow. Pretending there were connection issues was a merciful lie, offering the culprits a hand to somewhat save their faces instead of being directly humiliated in front of the entire 200 million people strong audience. If the cheaters cannot accept that and continue playing the victim card, I have no more words.
Don't blame the EBU. Blame the cheaters.
(Of course, I am very sorry for all fans coming from those countries, you guys certainly aren't at fault!).