The irony about the Strange Fire conference is that the Bible actually teaches us to have meetings that allow for speaking in tongues and prophesying.
The use of the term 'strange fire' to refer to unauthorized activities in a church service dates back to the Reformation era. John Knox had a sermon on it. The term was used to refer to certain Roman Catholic practices.
The idea is that doing things in worship, in the service, in church... however you put it. that aren't Biblical authorized is akin to Nadab and Abihu offering strange fire in the temple. I am not saying I agree with that assertion. But if I did, I would find it extremely ironic that John MacArthur would choose such a passage, since scripture does not teach the church to follow many of the traditions he holds dear. It teaches an orderly exercise of the types of gifts he opposes using in church.
We have one lengthy passage of scripture that teaches us what to do in church. There are two if you count a passage that tells us how not to have the Lord's Supper. The passage is I Corinthians 14 (and the other is I Corinthians 11.)
Does Paul say when the church gathers, they are all to sit quietly while one man, the pastor, preaches a sermon? No. There are no instructions to listen to one long sermon. There is no reference to 'the pastor' in the passage, or even the elders or overseers.
Rather, what we do see is Paul saying in verse 26 'when ye come together, every one of you hath a psalm, hath a doctrine, hath a tongue, hath a revelation, hath an interpretation.' Does he rebuke them for this? Does he tell them to stop? Does he tell them to sit down and listen to the sermon?
No, he tells them 'Let all things be done unto edifying.' So regular believers in church are allowed to sing psalms, teach, have a tongue, revelation, an interpretation 'unto edifying.' Paul says to let all things be done. It stands to reason he is talking about the things he mentioned, psalms, teaching, a tongue, etc. He puts the restriction on it that it must be done unto edifying.
Paul's instructions allow for one to speak in tongues and require interpretation. There is no mention of 'the pastor' in the passage, but Paul does mention the prophets. They are to speak two or three and the other are to judge. Paul gives instructions about yielding the floor to one sitting by who receives a revelation and says 'ye may all prophesy.'
So these types of charismatic activities are to be allowed in church. But they must be done in an orderly manner. Paul later says 'Let everything be done decently and in order.' This is not the order of a RCC church service or Presbyterian service. This is the order of the type of meeting Paul is talking about, where 'every one of you' may sing, teach, prophesy, speak int tongues, etc. Order involves such things as the speaking prophet yielding the floor for another who receives a revelation. It involves allowing for tongues and interpretation.
Paul even calls what he wrote the commandments of the Lord.
So if someone adamantly insist that we do NOT allow what Paul instructed, and instead follow rigidly a tradition of a long sermon by one speaker and few other activities like a prayer and singing in the meeting, then who is promoting church meetings contrary to scripture. If doing so is analogous to 'strange fire' in the temple (and I'm not saying I agree), then who is the one promoting the strange fire?