"When push comes to shove, and people see how suffering people are benefitting, I'm sure everyone will get behind it," said Yuli Edelstein, Israeli Minister of Public Diplomacy, as he toured Israel's largest marijuana growing farm, Tikun Olam, on Thursday and lauded the facility as an example of Israel's technological and medical advancements.
More: Israel pushing ahead in medical marijuana industry - Israel News, Ynetnews
Does get behind it mean to support? I do think that get behind must include the pronoun it because if we drop it, the meaning will change. As a result, it has nothing to do with what comes before (it is a part of get behind).
It comes before in the wider context, which mentions the medical marijuana industry.