I’m not fussy, any kind of proof of resurrection would be fine.
I’m saying we cast serious doubt on other claims of people being the messiah (which we must necessarily do so in order to confirm Jesus as the real McCoy), yet that option isn’t available to us in some sense, because there are countless claims of messiahship, and it’s not a practice anybody takes seriously–disconfirming gods so that they can justify belief in their own.
Belief in Jesus’ resurrection is therefore a faith-based enterprise, not one that’s going to be supported by evidence. Catholics and non-Catholics alike understand faith to be a flimsy concept though since there are, literally, an infinite number of appeals to faith, and so you don’t often hear people saying: “I just believe, okay?”
In keeping with the thread theme, Jesus’ divinity must surely also be a purely faith-based assertion.