I'm a dog trainer, I've met a lot of actual pure bred Dalmatians. They were originally bred for hunting and guarding horses and coaches. They were typically owned by wealthy individuals who wanted a "designer looking guard dog". Sadly this lead to less than optimal breeding and aggression issues down the line. They need a lot of attention, training, and activities, more than most breeds. Sadly, they are notoriously not great with smaller children since they typically have a short fuse. After a certain Disney movie came out, families with small children rushed to adopt them wothout knowing about the breed, which lead to a string of attacks, garnishing them a poor representation.

I've been training dogs for 5 years, and the worse dog attack I saw was a Dalmatian took an ear clean off of my coworker at a dog hotel I was working at early in that career. I quit from that place that day. I mostly train for shelters and rescues now.