What seemed like another mass shooting is being investigated as the deadliest terror attack on US soil since 9/11. President Obama was quick to caution against hasty conclusions - but with an election race on, an anti-Muslim backlash is rearing its head with Republican frontrunner Donald Trump promoting a ban on Muslim immigration. How does a nation founded by immigrants fleeing religious persecution feel about the chastising of Muslims? Is America turning its back on its trademark tolerance?
