🚀 go-pugleaf

Why do Canadians require passports to enter the United States and
Americans don't require passport to enter Canada? 
Are we as Canadians being profiled by the United States as a risk now?

From

http://www.cbsa-asfc.gc.ca/publications/pub/bsf5082-eng.html#s2x1

Border services officers are at the ports of entry to ensure that
people entering Canada respect Canadian laws. They are authorized to
examine people and goods entering Canada to determine their
admissibility. Their goal is to facilitate the entry of legitimate
travellers and goods as quickly as possible.

When you enter Canada, a border services officer may ask to see your
passport and a valid visa (if you are arriving from a country from
which one is required). If you are a U.S. citizen, you do not need a
passport to enter Canada; however, you should carry proof of your
citizenship such as a birth certificate, a certificate of citizenship
or naturalization or a Certificate of Indian Status, as well as a
photo ID. If you are a permanent resident of the United States, you
must bring your permanent resident card (i.e. green card) with you.
For more information on admissibility into Canada, read the fact sheet
called Managing Access to Canada. It is available on our Web site at
www.cbsa.gc.ca.

All travellers, including U.S. citizens, are encouraged to visit the
U.S. Customs and Border Protection's Web site at www.cbp.gov for
information on the U.S. Western Hemisphere Travel Initiative and its
traveller requirements to enter or return to the United States.