I'd say they are both at fault, and equally so. I heard Laura Ingraham last night, and she rightfully said they both need to stop making the attacks so personal. They're both at fault.
An alliance does seem pretty unlikely with the nasty statements of both, but Kennedy got Johnson, and Reagan chose Bush, so stranger things have happened.
Donald attacked first, Cruz stayed in steady reserve for ages.
When Donald started in on Hiede Ted lost his cool.
They both need to chill out