BEIRUT, Lebanon — Miss Lebanon was just minding her business, she says, when Miss Israel came along, pulled out a smartphone and snapped a selfie — posting it on her social media accounts and implying to all the world that the Lebanese beauty queen had been fraternizing with the enemy.

It was a weekend on which the Lebanese Internet was buzzing with allegations of Israeli offenses large and small.

An Israeli airstrike in Syria had killed Hezbollah fighters there, and Hezbollah loyalists were calling it a provocation, posting photographs of the funeral of the most prominent victim, the son of the top commander Imad Mughniyeh, who was assassinated in Damascus in 2008 in an attack that Hezbollah also attributes to Israel. The slogan “Je Suis Jihad Imad Mughniyeh,” honoring the son in the style of Charlie Hebdo, was shared tens of thousands of times.

Yet that outpouring was largely among Hezbollah loyalists. Uniting perhaps a broader-based segment of Lebanese citizens was outrage over a different act of (in their view) Israeli aggression.