Rabbi Akiva's students died due to baseless hatred. The plague ended on Lag B'Omer. There was a lot of strife recently in Israel. Did G-d cause a new plague due to baseless hatred, specifically on the same date?
You can't neglect safety protocols and keep secular authorities, code inspectors, engineers, safety experts etc out of a place and then blame God when there is a bad accident. It's called basic hishtadlus, and it wasn't done in this case. The charedi power brokers who controlled the site and the event planning, refused to make it safe, and continue to prevent an investigation, have blood on their hands.