WASHINGTON — Amendments to school textbooks by Syria’s new authorities have sparked outrage from parents, educators and rights groups. The changes, announced Wednesday, affect first-to-12th-grade schoolbooks in all Syrian schools, with a focus on history, religion and science textbooks. The Education Ministry under the country’s caretaker government announced the decision following the overthrow of former President Bashar al-Assad’s regime in an Islamist-led rebel offensive just weeks ago. The changes include removing all content “glorifying” the former Syrian regime, its leaders, symbols, and the Baath party, which had ruled Syria since 1963. The ministry’s directive also mandates revisions in subjects such