I was going to pick on a few sweeping comments and a few naive posters but after a coffee and a moments contemplation I'll generalise instead.
To those who believe that expat pilots are somehow less safe or a causal factor in any accident is a fallacy. While expat/local animosity in all industries has been around for time immemorial and, in aviation has the potential to adversely affect cockpit culture the reality is that "expats" wherever they may be can fly just as well, or badly, as any "local" pilot. For sure "expats" stuff up - take EK in MEL for example, but take a look at Garuda, Adam Air, Turkish or American and then try to tell me experienced locals don't make fatal errors of judgement also.
Attention needs to be focused on recruitment and check & training standards of airlines (and some DCA's) to improve safety rather than resorting to criminallisation of individuals or groups.