Uhh... I'm confused. He is "agnostic" (i.e., doesn't believe in the existence of God), but "believe[s] sorta kinda in God"? He isn't an agnostic; he is a polytheist. And also, you said he doesn't believe in "one word the Bible says", but believes in multiple gods because of the First Commandment? The first commandment is biblical, right?
>What are some tips on how to approach this?
Well, I would follow Greg Koukl's <em>Tactics</em>. Instead of presenting arguments, I would ask questions to expose the inconsistencies in their worldview (that's similar to the Socratic method). If you ask questions (genuinely and curiously), you're less likely to provoke a defensive reaction -- and a defensive reaction will only prevent a change of mind. For instance, you could ask, "You said you don't believe what the Bible says, but you also said you accept polytheism because of the First Commandment. So, why do you believe in the first and not in the others? I'm a bit confused.. can you help me understand your view?"
Haha. Nothing he said actually challenges OP, so his comments don't bother me at all. It is all irrelevant gobbledygook.
However, I'm interested in people who primarily use questions to debate. This tactic of using questions is recommended by religious apologists like Greg Koukl and Frank Turek. Basically the idea is to reverse the burden of proof and put the pressure on your opponent while you just sit down and relax. The opponent has to do all the hard work while you just keep shooting questions.
Apparently that's exactly what this individual is attempting to do here.
A great evangelism book is Tactics. I think it will answer a lot of your questions.
When people attack you always ask a question back. For example "you are an idiot to believe ...." what do you believe in you ask . O I believe in evolution says the other person. Wow you say you have more faith then me to believe that something came from nothing.
A very good book is from Greg Koukl https://www.amazon.com/dp/0310101468/ref=cm_sw_r_cp_apa_glt_fabc_TW1CH616Q3G6XS6MAYCN
Yes it's called Tactics. I recently bought a copy of the book and I'm half way through amazing stuff. I bought because I wanted to be able to talk to my co-workers which are very harsh or stubborn towards stuff of God but this book really helps you in telling you how to navigate those circumstances in a positive way. Tactics, 10th Anniversary Edition: A Game Plan for Discussing Your Christian Convictions https://www.amazon.com/dp/0310101468/ref=cm_sw_r_u_apa_i_45oKFb58BSCHY?_encoding=UTF8&psc=1
I've just started reading Tactics ( https://www.amazon.com/Tactics-10th-Anniversary-Discussing-Convictions/dp/0310101468/), which seems like a generalist's appologetic approach.
I have been most effective by reading the bible and reading their texts. E.g. read the bible and the quran to speak to Muslims. The bible and the Book of Mormon to speak to Mormons. Etc.
I have found that not all Muslims believe the same things and not all Mormons believe the same things. You really have to tailor the message to the individual person you are speaking with. I think, if you are just looking for a list of arguments you can tell Hindus and have them turn to Christ, you are going to be disappointed.
Tactics was my first intro into apologetics and I loved it.
Tactics, 10th Anniversary Edition: A Game Plan for Discussing Your Christian Convictions https://www.amazon.com/dp/0310101468/ref=cm_sw_r_cp_api_i_427GKWES9HQ91ZVMNBA7
But we can sow the fields.
Tactics is a great book about it.
Tactics, 10th Anniversary Edition: A Game Plan for Discussing Your Christian Convictions https://www.amazon.com/dp/0310101468/ref=cm_sw_r_cp_api_i_427GKWES9HQ91ZVMNBA7
I suggest getting Greg Koukl's book Tactics. It should answer your questions and guide you. I prayed for you.
Tactics by Greg Koukl
https://www.amazon.com/Tactics-10th-Anniversary-Discussing-Convictions/dp/0310101468
As another reformed guy here, let me point out some cool things that maybe you haven't considered.
There is also a great book called Tactics by Greg Koukl about how to talk to people about faith with other people. It encourages you not to win the argument but to put a pebble in someone's shoe, a thought that bothers them but they can't quite explain why.
https://www.amazon.com/Tactics-10th-Anniversary-Discussing-Convictions/dp/0310101468
Blessings to you.
Apologetics? I strongly recommend Greg Koukl's Tactics. Check it out. It's a must-read.