FannyFifer
yep and those journalists and reporters must be sons and daughters of folks like the OP and some others here, which I won't bother to look up name and shame 
Not any sense of what the issues might be, athletes from those 3 other countries might have with the anthem(cannot speak for Protestant/British N.I. though, not sure about them).
So, as long the status quo is not constantly challenged, as thankfully by the majority so it seems on this thread, then there will be plenty not only shamelessly bullying and posting these sorts of things, no, it will even continue on various other societal levels, and I deem that unacceptable.
And yes, in a free and democratic country, it is almost one's duty to speak up against ignorance 
And it IS important to at least have a sense to be able to separate between having a difference of opinions and differing views OR to simply being ignorant.