You haven't ever looked after, taught or raised children, have you earlywalker?
In ye olden days where us old lady prudes come from, the phrase for what you're doing now was "trying to teach grandmother to suck eggs". Nowadays we just call it mansplaining.
I don’t think it’s so bad to start teaching 5 year olds about people that are different.
Maybe you think children are all blind and deaf before 5 and haven't noticed any differences between people? Especially the differences between men and women, even babies are aware of those. Conversations about differences and kindness abound in houses with young children. Conversations about the political concept of "hate speech", not so much.
Kindergarten (not "garden") is for children under 5, what we in the UK (the area of the world this calendar and Mermaids exist within) would call nursery or preschool. At 5 most children enter primary school. This is when they learn more about mixing with other children, follow instructions, sing songs, recite the alphabet, etc. The idea that this is an appropriate time or place to introduce men in oversexualised womanface, using names like "Dixie Swallows", to talk about "acceptance without exception" while parading fetishwear, can only be supported by paedophiles and their delusional and/or stupid enablers.