It's specifically against an STD at a time when girls aren't even having sex. It's being marketed as an anti-cancer vaccine, but it's actually an anti-STD vaccine. The STD can cause the cancer, but it'd be like labeling the flu vaccine an anti-pneumonia vaccine. While preventing the flu can prevent pneumonia, it's not what the vaccine is actually against.
It doesn't even protect against all cervical cancer, so even telling girls, "This will keep you safe from cervical cancer," is dangerous because it gives people a false sense of security.
There are other reasons for opposing it, but it is a sexual issue.
Thank you for posting this. This is what I was saying. They are not really representing this thing correctly.