God has prescribed a very specific way for His people to serve and worship Him. Failure to abide by His ways hasn't changed since the days of Adam and Eve.
“And fire came out from before the Lord and consumed them, and they died before the Lord.” - Leviticus 10:2 ESV
At first glance, this verse paints God to be some sort of short-tempered bully. However, the same God, Jesus Christ said:
“But the one who hears and does not do them is like a man who built a house on the ground without a foundation. When the stream broke against it, immediately it fell, and the ruin of that house was great."”
- Luke 6:49 ESV
Thank God by His grace - the Holy Spirit and the revealed person of Jesus Christ through His Word will guide us into all truth. There is clear revelation through the Scripture for what God requires of His people.
Find out what God desires - the Truth of His Word should always prevail and not our own wisdom, emotion, or even our pastor if it contradicts Scripture. The consequence could be devastating.