A slaughter-house in which some of the workers do not pray

Dear Brothers & Sisters,
As-Salaamu-Alaikum wa Rahmatullahi wa Barakatuh. (May Allah's Peace, Mercy and Blessings be upon all of you)
One of our brothers/sisters has asked this question:
There is a slaughter-house in which some of the people who work there pray, and some do not. Most of the people who work there slander the religion of Islam. Is it permissible to eat the meat they slaughter?
(There may be some grammatical and spelling errors in the above statement. The forum does not change anything from questions, comments and statements received from our readers for circulation in confidentiality.)
Check below answers in case you are looking for other related questions:
Can we eat meat slaughtered by one who does not pray?
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Answer:

Praise be to Allaah.

It is not permissible to approve of those who slander the religion in this slaughter-house, even if they pray, because slandering the religion is kufr which puts a person beyond the pale of Islam. As for those who do not pray, they should not be left to do this job if they deny that it is obligatory, or they persist in not praying, or if they do not pray even at home. It is not permissible to eat the meat slaughtered by these people, even if they call themselves Muslims and mention the name of Allaah when they slaughter the meat. You should not keep quiet about them if they are in a Muslim country where the laws of sharee’ah are applied. If you cannot get them thrown out from this kind of work, then you have to warn the Muslims against eating meat slaughtered by them. And Allaah knows best.

Whatever written of Truth and benefit is only due to Allah's Assistance and Guidance, and whatever of error is of me. Allah Alone Knows Best and He is the Only Source of Strength.
Your brother and well wisher in Islam

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