I'm not sure that's entirely accurate. Of course you are right when you point to Muslim countries that are ugly dictatorships with anti-Western agendas: There are problems with Iran, Syria, to a lesser degree northern African Arab countries. But I don't think the troubles with these countries are primarily based on their Muslim religion. After all, there are many examples to the contrary: Saudi-Arabia is an orthodox Muslim country with a stone-age society, where the lable "islamofascism" actually fits -- yet, it's a close ally of the US and the West, and their leadership hardly makes trouble. Turkey is an example for a very open and even secular Muslim country. Egypt may occasionally be a little annoying, but in general is a US ally as well. And Indonesia, the most populous Muslim country, doesn't pose any threat whatsoever for the West.
All these countries may not meet our standards of a free and democratic society, but they are not attacking us either, or posing too many diplomatic problems. In fact, at very least peaceful coexistence, usually even significant amount of trade is very well possible and common with these countries. That they are Muslim apparently doesn't make them any more aggressive towards us.
The problems that arise, especially with Iran and Syria, probably have more to do with their status as emerging regional powers, including proliferation, similar to the problem with North Korea (which obviously isn't Muslim). The problem in Pakistan (and other generally peaceful Muslim countries) is hardly a problem of their entire population being extremist and anti-Western, but with smaller extremist Muslim subgroups within these countries, that are hardly a majority and usually opposed by the Muslim establishment within these countries and their elites.
So I don't think Islam in general is violent or especially expansionist, in general. There are problems, yes, but I don't think they can be generalized.