Ustadh Farid Dingle is asked if calling saying or thinking that a Muslim is non-Muslim wrongfully puts one outside of the fold of Islam.
Assalam alaykum wa rahmat Allah wa barakatuh.
I once typed a message saying some Muslims I do not like were not true Muslims, whispering the words to myself as I typed them. but then I remembered that Muslim laypeople are not allowed to say that and deleted the message. Did I still commit the sin of wrongful takfir? Does that make me a non-Muslim as that one hadifh said?
Wa alaykum assaalam wa rahmat Allah wa barakatuh.
The only way you leave Islam is by rejecting what made you a Muslim to begin with.
That said, we should all be very careful about what we say, because throwing words and labels around is not permissible.
I pray this helps.
Checked and approved by Shaykh Faraz Rabbani.