[WayneS]

Marx sharply criticized those who tried to solve their problems philosophically or religiously, i.e., in thought, and advocated that they can only be solved by changing reality in practice so that the problem disappears.

By that logic, the next time a marxist makes me angry I should simply kill him, thereby "changing reality in practice" so that my problem "disappears", instead of just walking away and reminding myself that the world is big enough to house people of differing political philosophies. Someone please correct me if I have misinterpreted Herr Marx.

[Olympiad Fisherman]

That happened all to often of course.