My father does not believe in Quran but he still says he is a muslim. What is your thoughts? (verses, revelation)

[The Grandeur]

My father denies what is written in Quran but still call himself a muslim.

I said you can't be a muslim if you deny anyting in Quran.

He doesn't accept quran verses yet he still calls himself a muslim. He says it is played with Quran.

[The Grandeur]

My father can't handle what is written in Quran. He denies Quran and he still calls himself a muslim.

[Khalif]

What is his definition of muslim?

Anyone who rejects the Qur'an is not a momin.

A momin is someone who has faith in revelations from God. A muslim is someone who believes in all revelations from God and then acts upon the instructions/guidance/commands from God.