They are looking for bloodline.

I agree that their can be a half- bloodline thru Mary who gave birth to siblings of Jesus with Joseph being the father. But I cannot entertain the notion that Jesus married and had children. He was found in a tomb with wife and child nullifies the reserrection- just can’t go there.

There's another theory that he did marry and have children but performed all the miracles he did, died on the cross and ascended to Heaven. I like that one.

That creates another royal family, of which most are not a part. Are you ok with that? Meaning, if you do not have that blood type, you are not worthy. Seems divisive- satan is a liar.