What's his deal with porn and ripping pictures of my little from fb?

Early in our relationship he told me he wasn't into porn and that really wasn't his thing. But I was like, "All guys dabble in it, it's really ok." Fast forward a few years and when I was cleaning out our closet I found a duffle bag full of porn. I'm talking about in total maybe 300 videos. In the bag was up skirt pictures from Mexico, He denies any of it is his. And when I was trying to fix his phone, I saw he took pictures of a woman's butt up close while he was at work. Then a few yrs later he starts being sneaky on his phone. He ended up in the emergency room, and they took him back into a CT scan and I went through his phone. He ripped pictures from my 20 yr old cousin's fb. I deleted them. I felt trapped because I was a few weeks pregnant with our 3rd kid. Then a few wks later, he was being sneaky with his phone and never ever leaving it unattended...EVER. So while he slept I went through his phone and I found like 15 pictures of my cousins on his fb along with a bunch of porn! He emailed many pictures of my cousin to his fake yahoo account. And along with these more pictures of a chick that probably had no idea her photo graph was being taken. I confront him and he delected it on me and my past mistakes in our relationship. The random porn doesn't really bother me, but why have pictures of my cousin is to say took some "sexy" type of pictures? That crossed a huge line with me as well as the picture taking of people who don't know they are being photographed. I don't trust him around my family, and I feel as if I have to separate that family life and him at all times because I can't get what he probably did to those pictures of her. I highly doubt she is interested in him. Sometimes I look at him and it creeps me out.