Did this in Caesar seem ambitious? When that the poor have cried, Caesar hath wept: (3.2.64) This is saying that is Caesar really ambitious when the poo cried so did Caesar, and the ambition shouldn't be soft .
You all did love him once, not without cause: What cause withholds you then, to mourn for him? (3.2.65) This is saying that everyone loved him at one point so what is holding everyone back from loving him now.
You all did see that on the Lupercal I thrice presented him a kingly crown, Which he did thrice refuse: was this ambition? Yet Brutus says he was ambitious; (3.2.65) This is saying that Caesar was offered the crown three times in one day and didn't take it so does that make him ambitious?