What are some of the more controversial and perhaps illogical sayings from the New Testament?

I was having a discussion with a friend about religion (rarely a good idea) and when I mentioned some of the stranger notions from the bible such as stoning misbehaving children etc, he reminded me that these are all from the Old Testament. I’ve been trying to research if the New Testament has something similar and the best way to do that would be to read it myself. But since I don’t have the time for that at this moment, I thought I’d throw the Q out to you guys. Also, does the New Testament prohibit marriage between homosexuals? Or something to that effect? If so, could you provide me with the concerning quote?

Also, this is purely an intellectual discussion to try to think of possible flaws in the new testament manuscript. There don’t HAVE to be flaws or illogical sayings. We are just wondering if there are any. Please please please don’t turn this into a hate/religion discussion. The point of this is to see how fair it is to closely follow the new testament based on its consistency/logic.

Oh and I am aware that similar Qs have been asked in the past but I was unable to find any answers discussing the new testament. If you know that there are some like that, please don’t hesitate to link me! Thanks