The terrorist who killed 15 people when he plowed his truck down crowded Bourbon Street in New Orleans was an American-born military veteran who was living in a run-down trailer park where he kept sheep and goats in the yard — just blocks away from the local mosque. -snip- Jabbar lived in a squalid trailer park on the outskirts of Houston that is home to mostly Muslim immigrants. Geese, chickens, and sheep roamed freely in Jabbar’s yard when The Post visited hours after the attack. One neighbor told The Post she spoke only Urdu, Pakistan’s national language. The neighborhood is...