Walmart and Asda

I have a bit of a quandary here. There is a Walmart boycott called for in the US, and Walmart own the supermarket chain Asda in the UK. Our town's largest cheapest supermarket is Asda. They irritate me, but DH ain't going to shop anywhere else (except the greengrocers, which is even cheaper - thank God for greengrocers, long may they wave.) So I don't know about this boycott; it is only called for in the US, which makes me think most of the organisers don't even know about Walmarts overseas holdings. And it's a pretty woosie boycott - it's only for the holidays. Hmmm.