“Traveling while Muslim” is the reality that many of us face these days. I hope to return this fall to the United States to see friends in New York, but I wonder whether I will be able to keep panic at bay when my plane lands and I must face customs and immigration officials. In those anxious moments, I am reduced to my ethno-religious origin. Not an individual, I am seen as just a Muslim — viewed only as being a possible threat.

Sadly, as fears of global terrorism have heightened, my experiences this year do not count as my worst. In May 2015, when I flew to New York to celebrate a friend’s 30th birthday, I was taken aside at J.F.K. and told to sit down, then questioned by one official after another. It was a humiliating and terrifying experience. But this year’s travel ban, shutting out citizens from entire countries with Muslim majorities, has shaken me to my core.

What is especially disheartening to me and many of my Muslim friends is that our British-ness — our love of English breakfast tea with buttery biscuits, our obsession with soccer clubs (mine being the Arsenal club in North London), our British slang and mannerisms that lead our Somali parents, rolling their eyes, to call us “fish and chips,” not even our valid travel documents — protect us.

Mr. Versi, with the Muslim Council of Britain, said recent high-profile cases involving Muslim travelers, including a teacher on a field trip and a family heading to Disneyland who were stopped from travel to the United States, have further alarmed British Muslims.

“When individuals hear stories of people being stopped, this changes their perception of the openness of the country, which might have been associated with the United States in the past,” Mr. Versi said.

Adam Matan, 30, feels he is in a quandary because of the travel ban. A director at a Somali-run organization, the Anti-Tribalism Movement, in London, he is not certain he will be able to visit the United States as planned in September for a business meeting. This is despite having a valid visa and holding a British passport.

Like me, he is British-Somali, and he has traveled to Somalia for his work many times in the last two years. Because of this, he would not be surprised if his visa is no longer valid under the Supreme Court’s recent ruling. He said United States embassy officials in Nairobi, Kenya, whom he has gotten to know over the years, agreed with his assessment. Now, he is not sure whether he needs to apply for a new visa.