Another week, another mass shooting

[Philippus Flavius Homovallumus]

Why did they exclude Northern Ireland for only the deaths?

It would likely skew the results for one thing, and since the troubles stats on anything violence-related in NI have been either difficult to verify or politically charged.

The source didn't include those statistics and this happens often with many things not including Northern Ireland. Northern Ireland is kind of its own autonomous entity within the Union, I guess kind of like Puerto Rico is to the United States missing out on things.

This is complete nonsense - NI is only about as autonomous as Wales - Scotland has far more autonomy. It has to gdo with the government facing non-co-operation and therefore having trouble getting stats that are accurate.

Then why include the NI population and estimated gun ownership numbers in the other stats? The last statistic is the important one, yet it only covers Great Britain.

Same reason - bad stats. Likely they don't have an easy way to separate NI from those stats and no easy way to include them in the others.