The shirt is simulteanously saying “I love America, and BYU!”
That’s pretty obvious. What’s a little less obvious, but still apparent is that it’s also saying...
“And in addition to loving America and BYU... I also love staying at distant relatives house whom I rarely speak to, so I can save money on my Disney land trip. And I love buffets. And I love 3rd and 4th helpings at ward parties. And I love sharing Netflix accounts with my siblings and parents. And I like tucking my t shirts into my jeans.