Ben's an ignorant fool. 3/4 of my family is Catholic, and I've been to Rome a few times and several cities in Italy (family scattered throughout), and I have NEVER seen a crucifix with Mary being crucified. Maybe a decorative cross with the Madonna holding the infant Christ, but NEVER as her being a redemptress.
I've been to or in about a million Catholic weddings, and many did have the couple honor Mary with flowers, but as a tradition of recognizing her as the model of perfect womanhood/wifehood/motherhood and implying that the couples want to exemplify her devotion to God during their marriage and childrearing.
I've also been on a few mission trips to rural Mexico (I know this isn't where Ben and Jessa went, but it is Latin America) with my Methodist relatives. We built and maintained a school. We aren't as fundie or zealous as Benessa, but those types did similar trips. When you have an annoying, condescending, over eager missionary, the most common answer was "We're Catholic," simply to get the zealots to go away. Most people in Latin America are traditionally Catholic, whether or not they were baptized, confirmed, attend mass, or basically do anything besides claim the title. That's not to say there aren't devout Catholics in Latin America, just as there are tons of people who identify as Baptists or Methodists or whatever in the US who never go to church.
If Ben had an ounce of maturity or any real desire to actually learn about whatever he's ranting on for the moment, he wouldn't make such ignorant and intolerant claims. It's perfectly OK to express your opinion, but when you spout falsehoods with no desire to learn facts, you're a pompous idiot.