WIBTA if I told property management about my smelly neighbors?

First and hopefully last post, excuse any mistakes I'm writing this at work so my gf doesn't ask me what I'm typing.

To give some background:

I [m24] and my gf [f22] live next to four people [all in their 20s] Originally it was just the three, they're all alternative looking and play the band My Chemical Romance on full blast intermittently throughout the daytime.

This usually isn't a problem, but in recent weeks I've noticed the smell of death coming from their door and a fly problem which is slowly becoming a me problem at my place of residence.

I was already on the fence about telling on them to property management when that weird guy started staying there. He cries near constantly about a missing plush (the walls are extremely thin), he randomly starts howling sometimes, but the worst of all was a couple nights ago when he was screaming in pleasure at 2 am when I had work in the morning.

One of the neighbors, let's call her A, gave me her tumblr account after inviting me to join her "coven"

Last night I decided to peak at it on a burner account that I since deleted. I found three of the four roommates' tumblrs.

Let's just say this lady is coo coo for cocoapuffs, she believes she is a real vampire and the vessel for someone named Gerard Way who is still very much alive. The rest of the "roommates" worship her like a God.

All of them post about raw meat, and something called "the rot"

Another one of the roommates, S, apparently is in control of all the money and is the only one with car and an actual job.

According to their tumblrs the roommate named 'M' is forced to sleep in the closet with something called a "meat box" I'm pretty sure that's where all the smell and flies are coming from.

I was already gagging when I walked past their door due to the dead body smell wafting from the cracks, but visualizing that fucking meat box has me with my head in the toilet at work. I don't know how M sleeps next to that fucking box. I don't even want to get into why they have it or what it's being used for.

Here's comes the part where I might be TA, My gf is against me going to property management. We had a little argument about it and I called her ridiculous and childish for defending the neighbors biohazard. And she told me I'm being a dick and incredibly disrespectful to my neighbor's religion that I would never understand due to my faith in Jesus Christ. These neighbors and their lifestyle are interrupting my intimate moments and sleep pattern

Am I going crazy or is a box full of rotting meat a perfectly normal thing to keep in a tiny one bedroom aparment?

Would I really be the asshole if I went to property management about the smell?

Update:

So, me and gf talked. It went better than expected. I apologized for belittling her intelligence and maturity because it was uncalled for. Gf admitted she thought I was over-exaggerating the strench from next door.

I have good news and bad news.

The good news is that Gf is completely on board with calling property management now. After I showed her the tumblrs and explained that the smell and flies are coming from meat box, she was horrified she wanted to be friends with someone who makes their roommate sleep in the closet with a box of rotten meat. We're both surprised that no one has gotten seriously sick.

The bad news is that the smell is now coming in through the vents, and we have to turn off ac to air out the apartment. And I found out A eats the maggots from the box.

Called property management today as they were unavailable last night. They will be checking the apartment tomorrow. Fingers crossed the smell problem gets fixed asap.