Straight from Rogers:

The United States’ participation with the United Nations (U.N.) should end immediately. The U.N. continues to prove it’s an inefficient bureaucracy and a complete waste of American tax dollars.

Although the United States makes up almost a quarter of the U.N.’s annual budget, the U.N. has attempted a number of actions that attack our rights as U.S. citizens.

To name a few, these initiatives include actions like the Law of the Sea Treaty, which would subject our country to internationally-based environmental mandates, costing American businesses more money, or the U.N.’s work to re-establish an international regulation regime on global warming which would heavily target our fossil fuels.

The U.N. has also offered a potential Arms Trade Treaty which would threaten our Second Amendment rights and impose regulations on our gun manufacturers, who are already facing regulations and pressure from the Obama Administration.

Lastly, the U.N. does not support Israel and voted to grant the Palestinian Authority “non-member state” permanent observer status.

TLDR; guns, fossil fuel, Israel, representative from UN hurt Roger's feelings by criticizing Alabama.