Why is America so prone to tornadoes and hurricanes?

The United States extends from tropical conditions in the south along the gulf, to arctic conditions in the north. The Rockies from a barrier on the west, and the Appalachians on the east. The wind patterns coming off the Rockies, and how the moist warm air meets the colder northern air creates tornadoes predominently in the middle section of the US, where it’s relatively flat.

Tornadoes do happen in other countries, but not with the same frequency.

Fascinating read on tornadoes.

Your basic assumption is false. Whilst the United States has the most actual tornadoes, the United Kingdom is the country with the highest incidence of tornadoes per square mile. Thankfully these are always mild to moderate in strength.

location, geography and the gulf stream

In Europe the number of severe tornadoes is significantly lower than in the US. Because of the Alps going from West to East instead of North to South. Last time Germany saw one F4 was 1968.

I blame Canada.

Do you live in a state prone for tornadoes or hurricanes?

Yep, for most of my 40 years.