You're focusing on a few tender blades of green and arguing that they are in no way harmful. Viewing the problem in isolation, you're probably right.
Now lift your eyes and see the forest of kudzu that is Islam.
Here's a link to a website you should look at. West Point Remembrance It's a list of all the West Point graduates who have died while fighting the war on terror. If you for one second think that West Point isn't aware of the stakes of the war we are fighting, you are even more arrogant than you sound. Your awareness of the evils of Islam amount to nothing compared to the actual experience of the men and women who have and continue to risk their lives fighting islamic radicals. The same men and women who teach and lead new young warriors at West Point. To stick with your gardening analogy...you keep trimming weeds. But rest easy in the knowledge that there are hundreds of thousands of dedicated Americans facing every day an evil you only dare preach about. And they DO NOT need your wisdom regarding an enemy they are INTIMATELY familiar with.