I was on Lebanon's reddit at the time. One thing that the media won't tell you, everyone in the area heard an airplane (the fighter jet or bomber sort) right before the explosion. It was agreed they were attacked by the Israelis, I find it strange that it was left out of the main discussions.

Was there Nitrates? Might as well be. Was it left there intentionally? Why not. Lebanon is one of the most if not the most corrupt countries in the world.

My personal theory, the amount of nitrates originally placed in the port was actually much much bigger than the one which finally exploded, the original plan was to wipe out even bigger parts of Beirut, but because the Lebanese are consistent with their corruption, by the time the Israelis ordered the attack, the Lebanese have stolen most of it already and the explosion as big as it was, was smaller than the one the Jews intended.

Anyway Lebanon now is completely destroyed, money were siphoned out to Israelis and Saudis long ago, they do not have gasoline or even food, it's ripe for a civil war, all in preparation for Israel to retake southern Lebanon at some point.

Modern warfare: be recruited to their business, work your way up the company, then enact policies that are self-destructive.

Find who recently joined their Board overseeing storage/safety.

Just from the location, I figured it had to do with Russia and Syria. No evidence, just spin-the-wheel-of-blame.

Last year's explosion in Beirut

It was to destroy their economy and most of Lebannons grain storage to send the country into a spiral in an effort to have the Israeli supportive UN take over there.

The truck bomb in the 80s?