Why only religious beliefs protected?

[BrianSoddingBoru4]

Me?  This isn't about me personally.

It just came up whilst learning about UK employment laws and protected characteristics.  

It occurred to me that some are quite unfair, and this one especially so.

For example, why must a company legally accommodate people's dietary issues based on their religion, but not on something like veganism?  Or accommodate prayer breaks and religious holidays and dress, but not ones based on one's Marxism?

It seems an unfair difference, and gives religion greater rights than others.  This is not conducive to weaning society away from religion.

Ok, what specific non-religious are people being punished for?

I very much doubt that there are corporate cafeterias with no vegan options.

I’m unaware that there are holidays and dress based on Marxism.

But those things are practices, not beliefs, so I ask again: what non-religious beliefs are people being punished for?

Boru