1. This sentence clause, "... Far-right and anti-LGBTQ social media group, Libs of Tiktok, and the conservative Moms for Liberty ..." tells you what you need to know about the USA Today writer is doing. "Conservative" is appropriate, giving context to the group (who they nevertheless did not quote). "Far-right and anti-LGBTQ" is the writer inserting editorial commentary into a supposed news article.
2. Other than mentioning that LoT and/or MfL had embedded a local news station's interview with an objecting local person and that outsiders had doxxed several staff (info that locals would likely have had anyway), the article gave no specifics as to what supposedly had teachers "Afraid to go to school". The lurid claim that is unsupported by specifics means the claim is from activists, directly and through agitating fellow teachers.