That seems very unlikely to be true in the US. There are far more very strongly religious people here than there are strongly religious people, and a considerably larger percentage of religious people than feminists are anti-porn.
While religious groups are likely quite a bit larger and louder (and thus politically relevant) in the US than in europe, there are certainly very strong feminist groups in the picture in the US as well. For reference, see the ongoing debate on the ACA contraception mandate (if feminism held no sway over religious groups, it would be dead and buried long ago) and the fact that abortion is a perennial topic of debate. (Incidentally, most countries in Europe have abortion laws that would be completely unpalatable to US women's groups - on-demand abortion is generally only allowed in the first trimester, while Planned Parenthood fought for the right to partial birth abortion in the US in 2006).
