catonsville md president barack obama make first visit u.s. mosque wednesday effort allay fear americans accustom pop-culture portrayals muslims terrorists reassure muslim american youth place nation obama declare attack islam attack religions decry inexcusable political rhetoric muslims donald trump republican presidential candidates understand attack one faith attack faiths say mosque outside baltimore say receive threats twice past year religious group target responsibility speak up trump republican front-runner call temporary ban muslims enter unite state authorities describe california couple kill 14 people last december radicalize muslims inspire islamic state militants obama visit aim show americans another side islam speak cub scout attend school run mosque carry american maryland state flag prayer hall plain room save three row window pan 99 depict one name allah arabic think church synagogue temple mosque like familiar say obama follow islamic custom take shoe enter hall children lead audience men prayer cap women head scarves pledge allegiance man woman recite verse koran tolerance inclusion obama christian outline tenets islam give brief history muslims america note found father thomas jefferson specifically mention muslims speak american right freedom religion thomas jefferson opponents try stir things suggest muslim first say obama long accuse secretly muslim roar laugher good company say obama ask row muslim american military service members stand well ibtihaj muhammad member u.s. fence team first american olympian compete hijab head scarf year rio olympics president touch pop-culture depictions muslims terrorists television show muslim character unrelated national security obama say turn extremist group islamic state characterize pervert versions islam portray obama urge regular muslims show use little christian expression let light shine late tell crowd cheer children pack mosque gymnasium watch speech large screen one day could become president obama urge young muslims embrace worldview require choose faith patriotism fit right say muslim american muslim american obama visit mosque send point message non-muslims