Maybe the girlfriend he broke up with is a Sikh, or maybe she’s now dating a Sikh.
Also of interest, we have thousands of Indian software programmers, so you frequently see Hindus being chauffeured around by Sikhs.
More than once I've thought of the humorous irony of two distinct ethnic groups emigrating 10,000 miles, only to be re-united with the same ethnic groups and same economic status in the USA.