You dont have to buy any product.
Its your choice. If no business is willing to accommodate your
wish to not buy Halal, Kosher, Organic or GM modified or
whatever, you dont have to. It will likely limit your choice of products
but thats to bad.
Business is entitled to look at the big market picture
and are allowed to label as they wish. The minority of extreme fussy
types who dont want certification can always buy a plot of land in the
sticks and grow and bake your own. One Nation anti Halal types
can move into their own communes so as to avoid Halal
certified products. Halal free communes lol.
Get a life and don't let your prejudices destroy it.