Jessie it seems to bother you about privileges that Christians are afforded, collective worship, bishops in the legislature etc, these seem such trivial things to get so het up about.
They may not be to you - they are to others. Inequality bothers me, and religious influence on the state and proselytisation to children bothers me. Discrimination that means children can't get into their local schools, and that has been shown to be particularly excluding of the most disadvantaged kids, really bothers me. Letting the clergy of any faith, let alone one particular faith, have a say in lawmaking that affects everyone is particularly problematic.
I can't think of any special privileges in the workplace which is offered to Christians, unlike Muslims who are allowed time off to go and pray. Please tell me why one others you but not the other.
There is nothing in law that says anyone can have time off to pray at work. Best practice says accommodating religious observance (prayer, time off for festivals) should be considered and incorporated where possible). Nothing is stopping Christians asking for time off to pray, or for a religious festival, on the same basis as any other religion. Muslims are afforded no particular privilege or protection in law that isn't available to other faiths.
That said, the state has already designated the major Christian festivals as days off for most folk. Nothing to stop Christians asking for time off for the Assumption, though, if they observe it. The same laws and guidance apply.
That's the difference: the law and guidance applies to all faiths, unlike the cases I've stated where the privilege is only afforded to Christianity by law.
What workplaces do for their own staff beyond statute is a matter for them and their work forces, really. But again, the law requires them to be even handed in how they treat staff (so a crucifix could not be banned but a Star of David allowed, for example.)