Here are some things that you can discuss with the people in the US that you talk with about Israel and Apartheid. Israel controls, and claims sovereignty to, the territory of millions of Palestinians without granting them equal rights to Israelis. Rights such as the right to vote and the right to property are denied many of them. This disenfranchised population is subjected to another judicial system than the people with Israeli citizenship. Successive Israeli governments have for many decades had a policy that seeks to drive away this (primarily Muslim) population from their land in order to replace them with Jewish settlers. Israel places restrictions on their ability to conduct business or ply a trade, by imposing import/export restrictions, movement restrictions and outright bans such as the banning of fishing in large areas (restrictions which are not placed upon the Jewish population). Israel appropriates natural resources in the area (water for example) and uses it in a way that favours the Jewish population over the non-Jewish one - look at water consumption per capita in the occupied territories. The Israeli military and police use a degree of violence (and other abuse) against this population that would be unacceptable if it was used against the Israeli population. I'm sure there are more examples of the nature of the Israeli occupation that could be mentioned, but this is what I came up with off the top of my head.
White House says circumstances of Taliban leader's death remain uncertain (Reuters)
from the article: Two Golani soldiers accused of beating up tied Palestinian