I mean, can we pick and choose which parts of the Bible we like??
I think if you want to stay sane you have to. I also feel that Revelation 22:18 and 19, right at the end of the Bible, wouldn't have been needed had God been certain no one would alter the content. In other words, he expected it to be changed. So I take a lot of what's in this book with a huge grain of salt. You need to have common sense and a sound mind to determine if what is written is actually principled and 'good'. If it doesn't work for you, if it doesn't make sense, if it isn't supportive of people, then I'd chuck it.
Can I say I am still a Christian if I disagree with Paul's writings?
I think so. Paul wasn't Christ.