As far as I can tell, the chain of logic goes like this.
1: Cruz is consistent conservative.
2: Cruz is delegate hunting instead of winning over the popular vote.
3: Therefore I HATE YOU DONALD TRUMP! WAAAAAHHHHHHHHHHHHHH!
QED.
No Cruz is losing badly. He’s just not the choice of the average GOP voter. He has to resort to a loser level game of trying to woo delegates for a second ballot that will never happen.
>>3: Therefore I HATE YOU DONALD TRUMP! WAAAAAHHHHHHHHHHHHHH!
That’s what I read in their justifications too. It basically the same as the Progressive’s “My A/C just broke and it’s Bush’s fault!”