Lived there (Bahrain) for 12 years, this is pretty big deal, you have to take this in context of both religious and location-wise, Bahrain, Saudi Arabia are literally within 25 min to max. 2hrs flight from Qatar. This is similar to Germany and several European countries suddenly declaring that France should be kicked out of the European Union and cutting off ties.

As well, a lot of business and trade happens between the Gulf countries which is pretty much put to a stop right now. My family has business in both Qatar and Bahrain and they're very much wondering what to do.

Moreover, religious-wise, I'm not too familiar with Qatar, but I believe they would have a similar system to Bahrain where the rich 10% are Sunni and the poor 90% are Shia left over from the colonial days.