>>6606907 pb notable (lag baomer fire tradition)
The tradition originated as a celebration of the judean failed rebellion against the romans (the bar kochva rebelion).
The fires are meant to symbolise the bonfires that were used by the judean messengers for communication during the rebellion.
and now about the fires that happened in israel:
The israrli fake news msm tried to silence it, but in reality all those fires that occured didn't happen because of the holliday but they were set up by radical muslims under the cover of the holiday.
sauces:
http://www.israelnationalnews.com/News/News.aspx/263644
https://www.jpost.com/Israel-News/Three-men-arrested-for-alleged-arson-as-fires-rage-across-country-590599