evidence: Opponents of Israel’s punishing war in the Gaza Strip have called for boycotts of companies they claim support Israeli policies, and have drawn millions of views on social media. [...] It has found an influx of new adherents. By two months after the Oct. 7 Hamas attack on Israel and the beginning of the war, the hashtag #boycottisrael had about 340 million views on TikTok, and #BDS at least 3 billion, although the latter captures some posts on other topics. By January, there were almost half a million posts hashtagged #boycottisrael and 887,000 hashtagged #BDS on Instagram. [...] Here’s what to know about the campaigns to boycott Israel: