What does "some of" mean?

XXX sparked controversy among some of his 5.8 million Instagram followers on Thursday when he shared an image of a teenage boy brandishing a handgun.

I wonder how it feels to publish nonsense day after b day?

Today's gem

"Just half of people retiring in the next five years will get the full state pension. Those in their 20s, 30s and 40s, will be worse off by."

I imagine that the second sentence was meant to refer to those NOW in their 20s etc... , but I've no idea how the sentence was intended to conclude.

Worse than sacred cows?

Doctors 'too sacred to tell patients that they're dying': Staff having to 'learn on the job' how to break the news because of 'inadequate training'