Merriam-Webster Dictionary:
Definition of PANSY
1: a garden plant (Viola wittrockiana) derived chiefly from the hybridization of the European Johnny-jump-up (Viola tricolor) with other wild violets
also : its flower
2 a - offensive : a weak or effeminate man or boy
—used as a term of abuse and disparagement
2 b - offensive : a gay man
—used as a term of abuse and disparagement
The point of my post wasn't about it being a slur or not, as that's not my call to make. My point was about the intent of your post in general and the reaction you got. That's fine though, just not my cup of tea.