Even worse, the whole incident left the 11-year-old anxious that his December 19th adoption wouldn't end up happening, after having two previous adoptions fall through, leaving him in foster care and without a permanent family.
Students claim the teacher said, "Why on earth would you be happy about that?"
A substitute teacher in Utah has been fired after she told an 11-year-old boy named Daniel that he shouldn't be thankful for his adoptive dads because homosexuality is a "sin".
However, van Amstel claimed the child's substitute teacher allegedly expressed disdain in her response.
Louis and Josh van Amstel said their son, who they referred to as D.M.to protect his privacy, didn't want to talk about what happened because he was so traumatized by this teacher's rant. "Three girls asked her multiple times to stop". When she didn't they went to complain.
"I'm proud of those three girls and [the boy's] school for standing up for our family against this bully. We were livid. It's 2019 and this is a public school".
"She also tried to blame our son", van Amstel said, "and told him that it was his fault that she went off". "It's absolutely ridiculous and terrible what she did".
The couple's adoption of the boy is scheduled to be finalized on December 19, Fox 13 reported.
"This situation really hurt him. This person really hurt us", said van Amstel, a former dancer on "Dancing with the Stars".
Alpine School District spokesman David Stephenson said action had been taken but wouldn't elaborate further to the Tribune.
Stephenson did not immediately respond to PEOPLE's request for comment.
Staffing company Kelly Services, which the school district uses to hire substitute teachers, released a statement to PEOPLE on Sunday: "We are concerned about any reports of inappropriate conduct and take these matters very seriously".
DM didn't want to confront his teacher as he's had two failed adoptions before, and was anxious his dads might rethink their decision before his final court hearing on December 19.
The issue was raised with the school principal by three students who took objection to the offensive comments and the teacher was escorted from the building. We are investigating this situation.