NEW DELHI — Militants in Kashmir struck again on Monday, killing an Indian Army major and at least three other soldiers just days after orchestrating a devastating bombing that left dozens of Indian security forces dead.

Fears are now rising that Kashmir, a disputed region that lies between India and its regional rival, Pakistan, could be sliding into an especially deadly phase again.

Diplomatic relations between India and Pakistan are breaking down; Kashmiri students are being rounded up and attacked; other young people have been charged with sedition for criticizing the Indian Army; and Indians are lashing out at Pakistani civilians, including Bollywood actors.

The recent violence in Kashmir — a majority Muslim region that is mostly controlled by India, a predominantly Hindu nation — has uncapped a wave of jingoism that is sweeping across India. The orange, white and green national flag is going up everywhere, and many people say they want revenge.