I don't think either Mohammed or Jesus would approve of this kind of discernment. The Muslims who make such a discernment are those who do not read the Quran, in particular, the following verses...

Indeed, the believers, Jews, Christians, and Sabians— whoever truly believes in Allah and the Last Day and does good will have their reward with their Lord. And there will be no fear for them, nor will they grieve.

He grants wisdom to whoever He wills. And whoever is granted wisdom is certainly blessed with a great privilege. But none will be mindful of this except people of reason.

Those who do good will have the finest reward and even more. Neither gloom nor disgrace will cover their faces. It is they who will be the residents of Paradise. They will be there forever.

As for those who struggle in Our cause, We will certainly guide them to our Paths: For verily Allah is with those who do right.

None will be mindful of this except people of reason.

Will you not then be mindful?

If Allah had willed, He would have made you one community, but His Will is to test you with what He has given each of you. So compete with one another in doing good. To Allah, you will all return, and then He will inform you of the truth regarding your differences.

• Al-Baqarah 62, 269, Yunus 26, Al-’Ankabut 69, Ar-Ra’d 19, As-Saffat 155, Al-Ma'idah 48