I might be too nitpicky, but I object to the very idea of "winning" an election in this instance, especially if the other party will be able to form a coalition anyway.
With regard to your question: probably too early to say. I'd say chances are still 60-40 in favour of the SPÖ, but I might be in a state of cognitive dissonance.
You're partly right. The solution to the "problem" of immigration is to draw in more immigrants and naturalize them, so as to drown out the racist vote. This strategy is already starting to pay off in the US. I wish Europe was smart enough to follow suit...
*sigh* This attitude is why working-class people won't vote for social democrats anymore, and opt for parties like FPÖ, SD, PVV, and Front National instead. For a change, why not convince voters instead of bringing new ones in?