Out of these options, only looting should be considered theft. Taxation is more of a gray area in that, say, a 100% tax would clearly be theft but taxation as presently structured in developed countries is not "theft" the way ancaps and some libertarians say it is.
Profit and private property are also gray areas. While not inherently theft, and while necessary political goods, I take the same position as these gentlemen:
The money you hoard you stole from the poor, the unused clothes in your closet you stole from the naked, and those rotting shoes in your closet you stole from the needy.
The rich are in possession of the goods of the poor, even if they have acquired them honestly or inherited them legally.