By Maya Brown, CNN A non-profit organization has put up four billboards throughout South Florida in an effort to raise awareness about anti-Semitism and make people think about its effects. JewBelong, an online resource created to welcome and inspire Jewish people, put up the billboards on Friday throughout Miami-Dade and Broward counties as part of their #EndJewHate campaign. The campaign comes at a time of heightened concern over a rise in anti-Semitism across the country . It also comes weeks after a man held four people hostage at a Texas synagogue in an hourslong standoff and a series of anti-Semitic...