I agree with you about internal contradictions in reference to liberal and Arminian offshoots of Christianity, the Reformed faith the Puritans and other pre-2nd Awakening Christians would have been part of is a lot more systematic, consistent, and cohesive.

Sex is treated differently from other sin. We are told in Scripture to resist most sin but to flee from sexual sin. I would argue that that is in part due to the profound effect sex has on the human brain. Sex is the closest a person can naturally get to getting high, mild sexual abuse of a child rapidly changes their character, and pornography has similar effects on a person as drug addiction.

On the other hand, capitalism as a system elevates and provides for people (the clothes we wear, food we eat, houses we occupy, and technology we use are all because of capitalism) whereas communism is responsible for the majority of unnaturally caused human deaths pretty much ever.

Besides that, Jesus didn't teach communism/socialism or anything like that: he taught voluntarism and it's a principle seen played out quite beneficially for all people involved from Acts through the rest of the New Testament.

One of the biggest complaints I hear about Christianity is that if we support charity, we should support communism. But it's not and shouldn't ever have been the government's job to provide charity. It is the job of the church. And considering that you can't voluntarily give charity if you don't have the means and you won't have the means if the government taxes it all away, stifles economic growth, and wrecks the economy, yay capitalism! Apologies, my libertarianism is starting to show and the words "taxation is theft" are beginning to ring in my ears. I digress.

Catholics are more consistent than Protestants are by virtue of being a unified-ish body compared to 6,000 denominations. However, I would argue that Catholics are consistent with Catholic teaching but not consistent with Scripture. As a Christian, we believe that Scripture is God's word and that man's interpretation is prone to error, hence the phrase "semper reformanda", or "always reforming". We are continually in pursuit of being conformed to God's Word rather than forcing the Word to conform to our worldly views. Some churches heed this call more than others.

Having been formerly Southern Baptist and being basically Reformed Baptist now, I get what you mean. Calvinism vs Arminianism and complementarianism vs egalitarianism are big issues in the Southern Baptist Convention right now so quality of teaching at any given FSB church is a gamble.

So my apologies. I didn't plan on writing this much but I gey passionate talking about the faith. Long-windedness trails my passion and I end up with essay-length responses like this.