The singer expressed his shock at the recent homophobic attack on two women on a London bus after they refused to kiss.
Lambert who has received numerous awards for his LGBT advocacy and social activism, told A List: “We’ve made so much forward motion in terms of acceptance.
“It’s about trying to educate people, that’s the biggest piece of combating ignorance. Just getting people comfortable and understanding each other.
“It’s like this in the US too. The pendulum has swung backwards. There’s some regression among society. Certain forces giving a voice to bigotry. But I do think the silver lining is that these setbacks do motivate people to take a more active role.”
Figures from the Met Police show the number of homophobic hate crimes in London rose 16 per cent in the 12 months to April this year.
Referring to the bus attack on Melania Geymonat, 28, and her partner Chris, for which five people have been arrested and bailed, he said: “My heart goes out to those two women. It’s terrible. I was shocked.”
Referring to the attackers, he said: “You wonder about their parenting. Are they reflecting the attitudes of the household they were brought up in?”
Since finishing runner-up on American Idol in 2009, Lambert has sold millions of records as a solo artist, as well as joining Queen for the live tours in 2011.
In between joining the band on their touring schedule, which will take them to the US next month, the star has just recorded his fourth solo album, Velvet.
Adam Lambert’s new single New Eyes is out now.