One example: The US boarders are pretty much wide open due to current policies

Which policies are those, exactly? The Obama administration has deported more people than any other administration in history, and indeed more than every administration in the 20th century combined. What specific policies do you believe have made US borders more open than they had previously been?

we are taking in refugees from countries that have a high percentage of terrorists and terrorism.

We are taking in refugees who are fleeing those terrorists.

All future attacks that are a result from these lax policies can 100% blamed on the these past 8 years. And that is in addition to the attacks we have already had.

The "attacks we have already had" have been trivially insignificant. Fewer Americans are killed by terrorism than by changing light bulbs. Having your entire national policy revolve around such a tiny danger seems like a really bizarre and irrational choice.

Just look at the racial divide we have these days especially in black neighborhoods.

Are you genuinely suggesting that racism is a new problem in the last eight years?