Do you think Sunnis and Shias can get married?
According to the scholar sheikh Yusuf al-Qaradawi as long as the couple can respect each other then they can marry since there is not sufficient evidence to prohibit it. From the Sunni point of view, there is only an issue if the Shia person is an extremist who believes in attacking the Prophet’s Companions who are respected by Sunnis (as an example). If they are a pluralist and respect Sunnis then there is no issue.
However, like all multi-cultural marriages there can be issues. Even if the couple themselves have no problem with each other, it is possible that their families might have problems. Even if the couple are pluralists, the families may contain some who dislike Shias/Sunnis and this will not lead to an ideal atmosphere. But if both sides are open-minded then these problems will likely be minor.
Source: Fatwa in Arabic