Since the beginning of the current conflict, over 1,300 have been arrested in the West Bank, including 800 with ties to Hamas.
In September, Israel broke a 30-year record for administrative detention of Palestinians, hitting 1,264, Hamoked announced.
Elhadi was arrested after a series of social media posts that seemingly endorsed the violent actions of Hamas.
This arrest is part of the ongoing efforts to curb online incitement and endorsement of terrorism.
Israel Police have initiated investigations into nearly 100 suspects, with some already apprehended and set to be held in detention while investigations take place.
Police seized the suspect's phone and laptop after he was arrested for "incitement."
One of the suspects appeared in a video earlier this week where Orthodox Jews are seen spitting at Christian pilgrims carrying the Four Species.