Well, let's see
Nixon subverted the Paris Peace Talks in the last weeks of the 1968 election to deny Humphrey's victory. result? 30K+ more military deaths through 1975, and 100K+ more injuries.
Then there's Iraq.
... which led to the steaming pile we have now and for many years to come in the Middle east, which led to ...
Ft Hood shooting
and apparently San Bernardino slaughter.
etc, etc, etc
Then there's allowing assault rifles to be sold, 10s if no 100s more death vs handgun-only deaths.
Repugs make America much more insecure, and they totally suck at geopolitics and der Heimat defense (9/11)
Then add in several 1000s per year, if not 10Ks of diseased, dead Americans from Repugs not expanding Medicaid, including the Repugs' dead babies, dead mothers, excessive abortions due to lack of perinatal care, contracption.
Repugs are much more dangerous, homicidal to US than all the Muslim terrorists combined.