happiest, you have a very good point, and I think you are right. But, with more and more tragedies comes more and more opportunities to re-evaluate ourselves, try to improve in areas we may need improving in, and re-ignite a feeling of true connection to all of our fellow Jews, which tends to happen when we hear of tragedies such as the ones you mentioned. Hopefully, as long as we can take out lessons from everything that happened this year and truly improve ourselves, G-d won’t need to send us these “tragic reminders” to change us. If we were on a really high level, perhaps we would be able to change on our own, without external motivation.
I don’t know if this makes sense at all, but it’s just a thought!