I sang horror songs for the kids at the party
That seems very cruel. Why would you do that to the little kids?
I don't agree. They have to get used to the sound of horror and they will surely like them in the future.
I think that there are other songs that can be sung at the party. You should not sing scary songs, especially to kids that little.
You need to appreciate horror music and you don't have to be over sensitive.
Good for you if you like horror music, others may not like it so much like little kids, and it is wrong for you to force them to like it or hear it. I hope you just get people who also like horror music to listen to you next time as you will be appreciated better that way.