Comment 10 for bug 527314

'Rosenbaum_Figure_6U.svg' wasn't created with Inkscape either. Your test case 'test2.svg' has (partially deleted) remnants of the original file (e.g. clipped groups with text, clip-paths) that are not visible on-canvas.

I don't know if Inkscape crashes due to the SVG structure (clip-paths?) in those files created by Mathematica - but maybe you could try with a reduced original test case from Mathematica what triggers the crash in Inkscape (e.g. one without text or with a very basic diagram)?