You know, people have been doing crazy stuff for ever and using the Bible as cover for mind control for ever. If you want to condone those people who substitute emotion for brains then go ahead. Every Pentecostal service tries to out do the last one. They mercilessly whip themselves into an emotional fervor, each trying to out do the other.
We (Christians) are supposed to just sit back and cite cultural differences instead of saying the emperor has no clothes.
These crazies do the gospel no favors.
Hype, emotion and volume can and does often become a substitute for reality, esp. in the superficial society in which we live, yet institutionalized faith does more damage due to the numbers.
And when a member of one truly becomes born again then we can see how sometimes there more alarm over a pot that boils over then one that is not even simmering.
My neighbor is a Church of GOD minister and some call them Pentecostals. He's a good man who has devoted lots and time and effort in service to The Lord. A church even the same denomination such as Church of GOD can be as different as night and day depending on the pastor and congregation. As well some members take things way too literally such as spiritual gifts and your faith will heal you and if not it's your fault etc. Most of their pastors however will not say this.
But the thread is about a tragedy. Who's to blame? I'm sure many feel some guilt. It sounds like a tragic accident. Sad to say we are in an imperfect world of imperfect humans and the family needs prayers.
A church function can be lots of things including a fellowship meal outside of the sanctuary itself usually in another large room. Doors locked to the Baptismal pool in some churches would not have stopped a child from say climbing over a choir seat and falling into the pool. Miscommunications of who has a kid also happen even in the best of circumstances. The teen watching the child may have thought an adult or parent had the child who knows. We weren't there.
The Toddler is home with The Lord that much we do know for certain. The child was not of the age of accountability and thus an innocent child.
You’re not being a model of Christianity yourself, here. If your family experienced the tragic death of a young child, would you react positively or negatively to someone outside of your church using that occasion to mock and condemn that church? I take issue with some of their theology myself, but the only decent reaction would be to pray for them. You should try that instead. Just a suggestion.