Question

One who says that the resurrection of the dead is not from the Torah has no share in the World to Come, for all the Holy One’s attributes are measure for measure.
2 questions
1. If he will not merit resurrection of the dead, why does he also not merit the World to Come? And if you would say that this is really just an extra double payment, then that is not measure for measure, is it?
2. If someone does not actually say this but only thinks it, or writes this on this holy site, since on the question of where exactly it is written the Talmud twists itself quite a lot…    is the ruling also that he has no share? And if so, it should have written this about someone who thinks it, and that would have been more novel.