You shouldn't. Although if you refused to serve them because they supported Palace you should.
It's actually a good example.
If you took a Palace baker to court they'd just go for administration...
If the bakery refused to make a cake for a same sex wedding that is discrimination. But everyone is entitled to a view.
I think the bakery are wrong but support their right to be wrong.
You don't change attitudes by shutting people down.
I think some mischief was being made here. It doesn't...