Haters are not always your enemies.
Anyway, at the end if the day it's your head and they can't MAKE you do anything. I don't even talk hair with my friends because they are relaxed and they'll say I have to do too much. Like sitting at the salon for SIX hours for a style that'll last 2 WEEKS is easy. SMH.
If you love your curly hair, stick with it. If you agree, straightening won't send you to hell or anything.