Dare We Use Islamic Businesses?

This is certainly a difficult question. I would never raise that thought about Sikh, Jewish or Hindu businesses - but how can we know that monies going to Islamic businesses will not see a percentage being filtered off to Isis or the many other assorted Islamic terror groups? - That may be a slightly unlikely scenario - but, as this article shows, not an impossible one.
http://www.dailymail.co.uk/news/article-3761793/How-gave-1million-Sweet-Shop-jihadist-gang-held-sharia-surgeries-waged-campaign-hate.html