What is the ruling on one who advocates for communism or supports it, despite their acknowledgement of religions as a non-governing doctrine?

Communism is an infidel ideology that denies the existence of God and considers religion the opium of the people. Whoever advocates for it or supports it, while being aware of its true nature, disbelieves in Allah and His Messenger. Even if they were to acknowledge all religions and practice their rituals, they would not cease to be infidels unless they believe that Islam is the only accepted religion of Allah, rule by it alone, and disavow communism and all other false ideologies. This is because "Indeed, the religion in the sight of Allah is Islam," and "Whoever seeks a religion other than Islam, it will never be accepted from him," and "And whoever does not judge by what Allah has revealed – then it is those who are the disbelievers."