MIL & FIL think it's ok to give 1 year old sugar

They seem to think that just because my husband and their other children ate sugar when they were my daughters age that it's ok to want to give my daughter chocolate or other candies. They get mad and roll their eyes and say "how did they ever survive?! We've raised kids before it's ok" when I say no, there's been research done since the 80's when their kids were babies that show that sugar isn't good for babies. They make me feel like the bad guy for wanting my daughter to be healthy. I don't mind her getting sugar when she's older, but right now I don't want her to have all the bad stuff like tootsie pops (MILs suggestion for her) and chocolate and other sugary candies. Halloween is going to be hell because they want to give her candy.