When it starts to violate other people it becomes fascism, that's not nationalism anymore. Like the Arabs, how many nations did they steal from indigenous Christian Semites? How they conquer the more civilized Persian people and forced them to be Muslims, threw out their old pre-islam gov. and replace it with this new Islamic vassal? Arabs have gone beyond nationalism, they are what would hitler be proud of.
Nationalism is also much better than conservatism, which is too moderate and weak, exactly what the PC liberals can control. It is controlled opposition to liberalism.
To me it seems you are comparing apples and oranges.
Nationalism is the desire for a people to have a nation.
Conservatism is the political belief that government should be limited in its scope, both in its ability to legislate and its ability to tax.
http://dictionary.reference.com/browse/conservatismcon·serv·a·tism [kuhn-sur-vuh-tiz-uhm] Show IPAnoun
1. the disposition to preserve or restore what is established and traditional and to limit change.
2. the principles and practices of political conservatives.
http://dictionary.reference.com/browse/nationalism?s=tna·tion·al·ism [nash-uh-nl-iz-uhm, nash-nuh-liz-] Show IPAnoun
1. national spirit or aspirations.
2. devotion and loyalty to one's own nation; patriotism.
3. excessive patriotism; chauvinism.
4. the desire for national advancement or independence.
5. the policy or doctrine of asserting the interests of one's own nation, viewed as separate from the interests of other nations or the common interests of all nations.