She's shown support for her country doing so to the other contestants nation.
Let's try an analogy, if a hate group burn down your house, then a month later you end up in say, a darts tournament, against a member of said hate group. Not the one that burned your house down, but someone who made it clear they were happy that the event happened, do you think it's fair you should be expected to act civilly to said person?
Let's take the "Nazi bar" analogy people love to quote, do you think in that scenario the bartender was in the wrong to kick out the Nazi, since he's never kicked a BAME persons head in, he just likes the people who do an their iconography?