MEXICO CITY — An American anarchist who went by the name John Galton was shot dead at his home in the Mexican resort of Acapulco, sending shivers through a tightknit anti-establishment community of expatriates that organizes events in the violence-torn retreat with seminars on topics such as how to make money via cryptocurrencies. A woman describing herself as John’s partner, Lily, said via social media that she saw the gunmen go straight for John and his friend Jason Henza, 43. Henza made it to a private hospital with bullet wounds in an armpit, leg and hand. The hospital said he...