He is a dictator who the US govt & some EU govts are currently appeasing, by ignoring his ongoing genocide of Muslims and Christians in India. These appeasements have emboldened him to carry out religion-driven political assassinations in foreign soil. Modi uses systemic violence against religious minorities within India (& now outside) for his personal political ambition, as it makes him look like a Hindu strongman for his Hindu supremacst followers. His religious extremeism driven politics & dictatorship has enormous support among Indians living/ working/ studying outside India. Their voices are the loudest on social media and they support him and his religious extremeist political party monetarily, socially, and politically.

The Atlantic has summed up the situation in its article https://www.theatlantic.com/international/archive/2023/09/canada-nijjar-killing-india-trudeau-sikh/675383/

Alternate link : https://archive.ph/a8kJc

The appeasement of dictators doesn't work. They didnt work against Hitler, failed against Putin, and has turned countries into banana republics.. But the leaders of the developed democratic west continue to be idiots who follow a failed script. They refuse to speak & act against dictators.