It’s going to take work to educate people about this issue: Clear majorities of Americans support restrictions affecting transgender children, a Washington Post-KFF poll finds, offering political jet fuel for Republicans in statehouses and Congress who are pushing measures restricting curriculum, sports participation and medical care. Most Americans don’t believe it’s even possible to be a gender that differs from that assigned at birth. A 57 percent majority of adults said a person’s gender is determined from the start, with 43 percent saying it can differ. This is the saddest part: And some Americans have become more conservative on these questions as Republicans have seized the issue and worked to promote new restrictions. The Pew Research Center found 60 percent last year saying one’s gender is determined by the sex assigned at birth, up from 54 percent in 2017. Even among young adults, who are the most accepting of trans identity, about half said in the Post-KFF poll that a person’s gender is determined by their sex at birth. Alyssa Wells, 29, a behavior therapist in Daytona Beach, Fla., who participated in the Post-KFF survey, said her views have changed on this issue in recent years as she has learned more, chiefly from Christian podcasts. “At first I was on the side of acceptance, like using the pronouns and stuff, because I want people to be kind to each other. I don’t want people fighting all the time,” she said. But she has come to see things differently. “My concern with transgender is mostly…