MEXICO CITY- U.S. Ambassador to Mexico Tony Garza on Friday asked Mexicans to respect America's right to protect its borders and said there has been widespread misinformation about a proposal to extend to border walls and tighten immigration enforcement. In a five-page, more than 2,000-word newsletter released to coincide with the beginning of the new year, Garza wrote about House Bill 4437, which must still be considered by the U.S. Senate but would build 700 miles of additional fences along the U.S.-Mexico border while making illegal entry a felony and enlisting military and local police to help stop undocumented migrants....