To serve these foods to muslim friends

[MissMildred]

Hi - posting here for traffic but also because I don't want to BU. I invited some new school friends and their parents for a bbq in a couple of weeks and two of the families are muslim and mentioned they only eat halal.
I want to make an effort to make them feel comfortable, and it has also been very interesting learning all about what is halal or haram. Obviously no pork will be served. However, some of the guidance on the internet is not clear, so I wondered if anyone with this diet could help me with these items and whether it would BU to serve them up:

Vinegar - if I served this in eg. a coleslaw, are all types of vinegar fine? (Eg is the vinegar not seen as alcohol anymore?)
Butter - Am I overthinking this? Would you eat butter?
Alcohol - I know you wouldn't drink this, but is it acceptable for others in the group to be drinking a glass of wine?
Halloumi - I can't figure out if this is okay or not.

Also - any tips you might have would be great, especially if there are brands of crisps, bread, butter etc....you might use.

Thank you!

Very well said savvy

Agree Savvy nobody should have to justify it to others over and over again if they don’t want to eat a certain type of food.

If I decide not to eat orange food from now on nobody should be ARGUING with me that I need to eat carrots and oranges UNLESS I can provide a logical reason not to.

Not wanting to is enough of a reason.

If I decide not to eat orange food from now on nobody should be ARGUING with me that I need to eat carrots and oranges UNLESS I can provide a logical reason not to.

I don't think you get it.
Nobody is forcing anyone to eat a food they don't want to.
Refuse to eat orange food if you don't like orange - that's your right .
And if you refuse to eat halal food because you don't like Muslims , that's also your right . But then don't claim there is no prejudice involved.