North Americans who travel to Europe for the first time should include significant time in Italy on their itinerary.
Conclusion (should = opinion)
If a North American is going to Europe for the first time, they should plan to spend significant time in Italy.
Evidence
To develop an appreciation of a continent that goes beyond merely accumulating impressions, you should get thorough knowledge of at least one country.
And Italy seems to be easier to get to know than other European countries.
Evaluate
We need to move this into a more abstract realm, so let's try to remove all the specific nouns.
C: If you're going to do X for the first time, spend a good chunk of time on Y.
P1: Rather than just skimming the surface of several things, you should get deep knowledge of at least one thing.
P2: Y is very conducive to getting deep knowledge.
Goal
Let's find the answer we can best match up with that implicit principle.