Queer was a slur within living memory [1] - it's been largely reclaimed in the last few decades, but it's still offensive to some. You'll find that when respectable publications use the term, it's always in a positive context.

When it comes to LGBTQ it's not offensive - much like one can refer to legendary gangster rap group NWA by their chosen abbreviation, even if the N stands for a word you wouldn't use in polite company.

[1] https://www.npr.org/sections/publiceditor/2019/08/21/7523303...