Even that was justifiable in context, as Jade was extremely upset by this time and had cited that nobody liked her because she was up for nomination two weeks ago. Jonny responded by saying that nominations were over, but Jade kept going, and Jonny then lost it a bit and went off about being up three times. He did calm down, he told Jade he was fond of her, he found her funny, and it would be better if she forgot about the past and enjoyed the remaining time.
Kate went inside but did not go off to bed, and when Jade went to bed, Jonny and Kate had quite a long, intimate conversation on the sofas.
The problem is that Jade does not always articulate very well, more so when drunk and upset, so she approached Jonny and Kate in an aggressive, argumentative fashion, and upset them too. But Alex started it by accusing her of conspiring with Jonny and Kate to "vote out the competition and keep in the backstabber". Jade had been trying to say that they all voted the way they had because they were having fun and Tim and Alex had been acting miserable.
Alex's true character came out and he went too far.