The Heritage Foundation took a good hard look at the current bill and finds some serious issues with the claim that it increases homeland security:
Under Sections 601 (h)(1) and (5) of the bill, if an ICE [Immigration and Customs Enforcement] agent apprehends any alien who appears eligible for the Z visa (in other words, just about any illegal alien), the agent cannot detain him. Instead, ICE must provide the alien a reasonable opportunity to apply for the Z visa. This stands in stark contrast to the status quo, in which ICE can place the alien in detention and immediately initiate removal proceedings.That's just the tip of the iceberg. Read the whole thing (link in the title) to be really scared.