I need help with refutations for this

[MrJatt]

Okay here is some context, me and my cousin debate a lot. He is a dual major into his 4th year of philosophy and mathematics...and hes a Christian...(~drum roll smash~).

I asked him what is his reason being a theist and, why choose christianty over any other religion and here is what he said:

"the main two reasons I will give that I am a theist are:

1. I think belief in God is properly basic.
2. The likelihood of my cognitive structure structure retaining true beliefs is greater than on theism, than given atheism).

And for Christian theism in particularly:
3. Argument that God is not a unitarian God.
4. The Resurrection as the best explanation of certain facts about the historical Jesus.
5. Religious experience.
"

now i do not have the knowledge to refute these except the 5th one, so i need some help to understand and perhaps refute this.

Also Hello! this is my first post

Just to clarify, you want to gain the knowledge to be able to refute him? How do you know that this knowledge exists (ie that his points are wrong)?

Well, If you don't have the expertise to debate with someone do you automatically say, OK you are right i'm wrong? I tried Google, but i can't find relevant* information so i google the keyterms you guys mention and use them. I am no expert, therefore i rely on others to help me understand.

Also another key point, i don't have the knowledge to debate about Jesus.
As for God, after watch the videos posted why Eleazar i understand #1,2 and disagree.