...The problem has never been people of different races or genders appearing in Star Wars films. It's that it feels like at times their only personality is being the one black stormtrooper or being the girl who's good at everything.
Frankly, the concept that Star Wars fans, in general, are "threatened by strong women" is frankly ridiculous to me once you realize that Star Wars fans LOVE strong women. The entire reason Maria Jade caught on with the fandom where all the Kirk-style love interests for Luke failed was that she was the only one who was amazing in her own right. Go further into the old EU, and you get Jana Solo, the woman who was given the title "The Sword of the Jedi" and completely owns it. Literally, if someone was to create a thread titled "Jaina Solo is the most badass character in Star Wars, prove me wrong" on here or Spacebattles, there's like maybe 5 characters that could possibly be considered as contesters to that claim. In all of Star Wars, total.
Not a fan of the EU? Well, how about Leia, the woman who flat out would not break under torture, lied in the face of Tarken when faced with the threat of her entire planet's destruction, assumed control of the hodgepodged rescue mission attempted to save her and commanded the mission to destroy the Death Star. And that's just her achievements in the first film she was in. Looking for more modern examples? Well, if you have had any involvement with the Star Wars community in the past decade, you know about Ahsoka Tano. And well, I don't feel like I even need to explain why she loved by so much of the fandom.