Answer:
He is comparing the culture of having robust political conversations at Thanksgiving table during his parents' time as young people to the culture of Thanksgiving today.
Step-by-step explanation:
The statement in question is created the the sixteen-year-old teenage Director of "Build the Bridge", a teenage advocacy group trying to bridge the wide political gulf between liberals and conservatives in the United States.
In this statement, Levi is comparing the culture of having robust political conversations at the Thanksgiving table during his parents' time as young people to the culture of Thanksgiving today among American families today.
Families are simply shying away from having political discussions and debates at Thanksgiving today compared to his parents generation.
The reason for this is because liberals and conservatives are so divided in their political views and are not willing to accommodate the views of people not in their political circle. Hence if a family consists of members of opposing political parties, political discussions soon degenerate into arguments and fights.
"Build the Bridge" is on a mission to changing that mindset by listening to and accommodating differing political views amongst American teenagers.