"LRE = most devastating law for Deaf people. We should have MRE - Most Rich Environment. Or, Language Rich Environment." -- E. Lynn Jacobowitz (January 2020).
This video discusses Siegel's argument regarding the First Amendment in ensuring the human right to language for Deaf children.
Hearing parents and school administrators in their eye believed that mainstreaming is the least restrictive environment for Deaf children. Unfortunately, it's not always the case. The deaf children have often experienced isolation.
Deaf children are very much happier in their own bilingual schools where everyone can socialize and communicate in their own language in their best accessibility -- sign language, the natural and fully accessible modality of communication. Bilingual schools for Deaf children are the least restrictive environment.
"Are Least Restrictive Environments Actually Most Restrictive Environment In Disguise?" ASL Rose Newsletter. Vol. 6, No. 3. March 2012.
Harlane Lane, et al. A Journey into the Deaf-World. California: DawnSignPress. 1996. Chapters: "Educational Placement and the Deaf Child" (pp 228-265), "Bilingual and Bicultural Education for Deaf Children" (pp 293-314) and other related chapters.
You may be also interested in Education of the deaf.