NEW YORK — Parades celebrating LGBTQ pride kick off in some of America’s biggest cities Sunday amid new fears about the potential erosion of freedoms won through decades of activism. The annual marches in New York, San Francisco, Chicago and elsewhere take place just two days after one conservative justice on the Supreme Court signaled, in a ruling on abortion, that the court should reconsider the right to same-sex marriage recognized in 2015. That warning shot came after a year of legislative defeats for the LGBTQ community, including the passage of laws in some states limiting the discussion of sexual orientation or gender identity with children. [time-brightcove not-tgx=”true”] As anti-gay sentiments resurface, some are pushing for pride parades to return to their roots — less blocks-long street parties, more overtly civil rights marches. “It has gone from being a statement of advocacy and protest to being much more of a celebration of gay life,” Sean Clarkin, 67, said of New York City’s annual parade while enjoying a drink recently at Julius’s, one of the oldest gay bars in Manhattan’s Greenwich Village. As he remembers things, the parade was once about defiance and pushing against an oppressive mainstream that saw gays, lesbians and transgender people as unworthy outsiders. “As satisfying and empowering as it may be to now be accepted by the mainstream,” Clarkin said, “there was also something energizing and wonderful about being on the outside looking in.” Dan Dimant, a spokesperson for Heritage of Pride, the nonprofit that organizes New York City’s parade, said this year’s march will still be festive, with floats and “people dancing and celebrating.” “Pride is many things to many people.