So...I would take the first opportunity to introduce myself. On the stairwell when we pass, out in the garage, knocking on the door. Say hi, make small talk, be neighbourly. And mention that their alarm goes off loudly at 6am and you can hear it really well. Would it be a problem if they could attend to turning it off sooner than not? Yes? No? It's it awful how thin walls in these buildings are?

And then, even after having mentioned the alarm, whether or not they turn it down, continue to interact with them innocuously in future. 'Hi, how's it going?' 'Morning' Mention the alarm only occasionally, otherwise you're just nagging. And if they don't do anything about it, then invest in earplugs.

"I'm afraid of being accused of racism" is not a reason not to talk to your neighbours. At least, I wouldn't have thought it is.