Because the are a state sponsor of terrorism around the globe?
How much of that terrorism is directed towards us, and how much of it is a direct result of our alliance with Israel?
Because they are constantly screaming death to America?
Was this happening before our alliance with Israel, and would it continue if that alliance ended?
Because they are hostile towards our allies in the region?
Israel and Saudi Arabia, both of which also conduct terror attacks and one of which also openly hates America?
Because they have travelled outside of their country to kill American soldiers every chance they have?
Was this happening before our alliance with Israel, and would it continue if that alliance ended?