TAREK AMARA SEVERAL thousand demonstrators have rallied in the Tunisian capital to protest against President Kais Saied's seizure of power, calling on him to step down in the biggest show of public anger since his intervention. Saied this week brushed aside much of the 2014 constitution, giving himself power to rule by decree two months after he sacked the prime minister, suspended parliament and assumed executive authority. "The people want the fall of the coup," chanted the crowd on Tunis's Habib Bourguiba Avenue, a focal point of the demonstrations that ended the rule of former President Zine El Abidine Ben…