NEW DELHI—A lone Indian national flag seen amid the many American flags on Capitol Hill on Jan. 6 sparked an online spat between two Indian politicians while netizens reacted and took sides in the discussion. An Indian American named Vincent Xavier Palathingal, a Republican Party member who attended the rally because he believes the U.S. presidential election was fraudulent, was seen carrying the flag, the Indian news website The Quint reported. Palathingal said he attended to show that the United States isn’t a racist country and respects diversity, he told New Delhi Television (NDTV). However, the image of the Indian flag triggered a debate between two noted politicians of the ruling and the opposition parties. “Why is there any Indian flag there???”  tweeted a young Indian politician, Varun Gandhi of the ruling BJP party. “This is one fight we don’t need to participate in.” In response, Shashi Tharoor, a noted politician …