That is not even to mention that the gospel stories are not ANY evidence that Jesus rose from the dead because they (a) they contradict each other and (b) they can never be verified.
So what really is the Bible and the NT to Baha'is? Are you expected to believe it as "God's" gift or as something that isn't 100% authoritative or something that Baha'is are free to interpret in some metaphorical way? Sometimes Baha'is make it sound like it is totally undependable for anything. And lots of once, as I've said before, would agree with you. But they are Atheists.
If the tomb was empty, then that is evidence that God resurrected Jesus from the dead.
So the gospel writers say the tomb was empty. The story of who went to the tomb and what they saw varies. So already... Was it accurate that Jesus was put into this tomb? The stories about who came to the tomb are all different, so we can't say any of them are accurate. Plus, some have Jesus being seen alive by Mary and some have angels appearing. Do Baha'is start making the stories metaphorical at this point? I would say why not explain these variations by saying that several traditions were going about in the years prior to the gospel stories getting written.
So, you say that the empty tomb is not evidence that God raised Jesus from the dead, but that's only part of the claim... Jesus then appears to them and shows himself to be alive. The claim is that he has flesh and bone. They touch him and see the scars left by the nails. So the claims made by the gospel writers are that the apostles and other disciples saw him and are witnesses that he indeed had come back to life.
Baha'is have to make all of those stories and verses metaphorical. But they are told in the same way the rest of the story about the things Jesus said and did are told. I see no reason to suddenly make this part of the story metaphorical. Now making if fictional, a hoax, a story about Jesus with added embellishments with miraculous things in it to make him out to be a God-like, that I could believe.
Only some religious people take those stories as being literally true. With Baha'is calling them metaphorical, I think it is just as easy way for Baha'is to get away with saying they believe the Bible and the NT... but still deny some of the things in it ever really happened. And what the heck is so great about the Jesus story if he didn't rise from the dead? He's just another dead guy. What made Jesus great and a God was all these claims of the miraculous things he did, the greatest being the resurrection.
But... do we believe those claims? Other than what is written in the NT and few other books, what do we really know about those claims? Lots of us don't believe the claims. We don't believe in the God of the NT and the Hebrew Bible. We don't believe that God cursed the first humans and caused all people to be born with some kind of inherited sin or something. We don't believe that only believers in Jesus are going to some heavenly paradise and the rest are going to some eternal hell fire.
But are the claims of Baha'u'llah any better? Is the God described in the Baha'i writings more believable than the one or the ones in the other religions? If those weren't true, then why believe what Baha'is say about God? No, we can't go by what people say or write about God. Too many things have turned out to be wrong and just people making up their own versions of who God or the Gods are. So that's why there is a need for more objective and verifiable proof.
Now something we can see about religion is the way it was used to control people. Stories of Gods, angels, devils and demons were all part of those stories. They scared people into following the rules of the religion. And, with some offences, supposedly the Gods demanded the person be killed. Really? Is that what God wanted or was that what the religious leaders wanted? The power to kill those that disobeyed. And now we have the Baha'i Faith... another religion full of rules. Rules against sex, alcohol, drugs, long hair and probably rock and roll... like that's really going to work?