Is that a lot of times, they'll adopt or express sympathy for whatever ideology or sentiment you have, if they're interested in getting with you.
So for example, if you talk about being pro-pedo, she may say that she's pro-pedo too. Or at least she may avoid picking a fight with you about it.
This is while she's trying to attract you into a relationship. She may figure, once she gets you to fall in love with her, or marry her, or make kids with her, or otherwise commit to her, that she can then reveal her true self more, and assert her will more, and you'll be more likely to accept it because you're in too deep by that point to back out.
Also, a lot of times, women are fine with going along with a man's ideas as long as they're abstract and theoretical, and don't yet affect them directly in the real world. This gets back to my previous point, about how they try to lure you into a relationship by seeming congenial to your pedophilic viewpoints, plans, hopes, dreams, etc. Girls may figure, "There's not a lot of harm in letting him, for the time being, express some political rhetoric, or fantasize about hypothetical sex with young girls. I'll tolerate it for now, and if it's a problem later, I'll deal with it then."
A lot of times, too, they'll tell themselves, "Well, maybe he's not all that serious about this stuff." That goes hand-in-hand with their idea that maybe they can get you to change once they get you locked down.
If a girl seems to be agreeing with your pro-pedo stances, you may want to ask yourself, "What's her agenda; why is she agreeing with me about this? Has she really done her own independent thinking about this, or is she just being submissive to my wishes because she likes me and it's in her interests to be that way right now?"
Classic female mating strategy is to find out what you like and try to cater to it, or get your hopes up that she'll cater to it, during the courtship period. She hopes that you'll change, and you hope that she'll never change, and you'll both be disappointed.
If women weren't so deceptive, or if men weren't so gullible, it might be harder for the sexes to get together and mate, especially in a world like ours where women have so much freedom to do what they want (and thus it can be hard for you to impose your will upon them if they decide to betray you).