Well, some foreign policies can be argued to be wrong. I am also against the war in Iraq led by the US, the American intervention of Libya, which inadvertently saved the same people in East Libya from Qaddafi, who are now torching US embassies and killing their saviors, I am also against the US-led campaign in Bosnia and Kosovo and so on....
The policies may be wrong, but that's not what is driving Islamic terrorism (mainly). Muslim extremists have carried out terrorist attacks against countries that have never invaded them.
When an Iraqi terrorist blows himself up in the local mosque or at the market, killing innocent children and women, or a Pakistani gunman executes his own countrymen for being Shia Muslims, it's not because he's sick and tired of America's policies. It is the blind hatred that drives him.