In the post, he wrote: "I thought I would share. We've had disapproving looks, 'We are full', 'Is that your wife?' and many more actions questioning our relationship over the last 40-plus years.
"We haven't wavered...The best way of fighting racism is living your life, standing tall and educating."
I thought I would share..
We’ve had disapproving looks, ‘we are full’, ‘is that your wife’ and many more actions questioning our relationship over the last 40+yrs
We haven't wavered!
The best way of fighting racism is living your life, standing tall and educating. #Diversity pic.twitter.com/jmd0F0i71r
— Prof. John Struthers (@jjstruthersuk) December 26, 2017
The picture shows Prof Struthers wearing a kilt while standing next to his wife, who is wearing a dress made from traditional Ghanaian Kente cloth.
His comments appeared to resonate, as more than 18,000 people retweeted the post and more than 50,000 'liked' it. Hundreds shared stories of interracial couples in their lives.
Total respect for you both. My nan was disowned by her family in the early 50's for marrying my grandad who originally came from Nigeria (she was from Co. Mayo)
She chose love over ignorance and bigotry and the rest is history #diversity pic.twitter.com/J0KRitI5La
— Jay (@jstands4jay) December 27, 2017
In the US, lawyer Michael Brown, of Connecticut, shared a photo of he and his wife playing with their child, saying: "Living a full, happy life is the best weapon against hate."
Tom Quinn, based in London, shared a photo of himself with his wife on their wedding day, showing him in a traditional Scottish kilt and her in traditional Sikh garments.
He wrote: "I also wore a turban and sherwani for our Sikh ceremony."