what are two reasons why the Know-Nothings believed being Catholic was incompatible with being a United States citizen

The two reasons that Know-Nothings believed being Catholic was incompatible with being a United States citizen are that Catholics weren't compatible with Protestants neither did they want to be ruled by Americans.

Explanation:

The Know-Nothing was a political party in America prevalent during the late 1840s and early 1850s. This party was also known as American Party.

The American Party was in staunch opposition to the immigrants and Catholics. The two reasons that the Know-Nothings considered Catholic being incompatible with being United States citizen was because Catholics were not in agreement with Protestants, they despised Protestants. Other reason is that Catholics didn't want to be ruled by Americans.

This is why Know-Nothings believed Catholics as incompatible with being United States citizen.

this headline suggests that midterm congressional   elections are at the corner and trump administration wants to activate his base by vowing to clamp down on immigrants and immigration as trump had said during his election campaign around two years ago. when a baby is born in usa, the baby becomes citizen of usa for 85 years and trump wants to end this rule of birthright citizenship to control illegal immigration and this what he said in an interview""we’re the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the united states for 85 years, with all of those benefits,” "