Assalamualaikum
I too had this kind of conversation with my best friend. She is a Christian and her father is a priest.
So once , I sent her a video of yusuf estes reverting to islam. She texted that he didn't read the bible carefully and this isn't what Christianity teaches.
I then told her that bible has changed a lot from its original form. She wasn't ready to be convinced. We had a debate on all this for almost like 2 days. Then we agreed that she would read quran and I would read bible. I just read few starting verses from bible and that's it.
She said something which just led me to discontinue our conversation. I can't even say it .(Nauzubillah).
So this was my short story.boring..right?
But what I mean to tell you is that our religion is very much correct. These conversations are very sensitive and just lead to doubts. When I was involved in that conv., my heart was racing at such a fast pace. but i was so convinced that islam is correct.
If u ever get doubt, just think that Christianity was BEFORE islam. and MOST of the Christians do not even believe in monotheism, rather they are convinced with trinity thing. While islam teaches strict monotheism.
I don't know your intention behind this conv. but mine was to get her to straight path.
Haven't you heard the verse that Allah has sealed their hearts and they won't believe.
Yes, there will be Christians and jews too who will enter paradise but there are terms and conditions.I have so many questions which no Christian (who doesn't believe in monotheism) can answer.
Don't involve yourself in these types of conv. ,they will just sow doubts and shaitaan will try his best to divert you from straight path