Did advance Auto break My car?

ok. My car was cranking slow in the mornings. so i drove up to advance and had them do a load test on the battery. ever since they did that now it wont start. it wont crank. the starter wont even click. it has enough power to run the headlights and blast the horn and light up everything inside but it will not even try to crank. i put a new battery in it just to make sure. still nothing. it's a manual so we tried push starting it. i Pulled it with my jeep about 15 mph and had My friend engage the clutch and even at that speed it still would not fire. We dragged it 100 yards. popping the clutch along the way. it wouldn't even sputter. i checked the fuses. they are all good. i looked at the harness. No problem. is it just a coincidence this happened after the people at advanced load tested it? or is it likely that they screwed it up? what could they have possibly done that would cause such a problem? i didn't think those machines that do the load test would let you do it wrong. i thought that if it was hooked up wrong it wouldn't run the test. is that correct? i checked the fuses. its getting fuel. it's got plenty of juice in the battery. i can't think of anything else that could make that starter not engage. or not even allow it to fire during a push start. the whole thing is just dead. did advance break it? or is this just coincidence? i ask because i can't think of anything they could have done on a load test that could have done this. can you? oh its a 96 Plymouth Breeze in case your were wondering. nothing fancy. just an old pile of junk. :-)