Great topic Gunter!

How many people on the terrorist watch list are entering at the southern border?

The accurate data on that........if it exists is intentionally not released to the public. One c can guess that its more than it should be based on so many unauthorized people getting in. And possibly significant, since it provides easy access for entry to people that have nefarious motives.......and there are plenty of those kind out there.

How many terrorists have attempted to cross the southern border? Data is limited and imprecise

https://www.politifact.com/article/2021/mar/22/how-many-terrorists-have-attempted-cross-southern-/

• The terrorist watchlist has law enforcement and national security information concerning people believed to be involved in terrorist activities. As of 2017, an estimated 1.2 million people were on the watchlist, including 4,600 U.S. citizens and lawful permanent residents.
• Immigration officials won’t say how many people on the terrorist watchlist have attempted to cross the southern border — legally or illegally, because “any data would be considered law enforcement sensitive.”