Even though CISA has been controversial to both the public and Congress, slipping it into the omnibus bill (which deals with important funding) definitely decreases the chance that it won't pass or that it would be vetoed. Regardless of the CISA's drawbacks, the omnibus bill is too crucial to government projects for the CISA to affect its passing.
The lumping of CISA with the omnibus bill greatly reduces the chance for debate over its surveillance-friendly provisions. When lumped with a bill that will keep the government running, both Democrats and Republicans are swayed from voting against it. Government shut downs are greatly unfavorable to any party and any one who can be blamed for them. By lumping CISA into a funding bill, it in a sense, hides the program.
When we, as a people, lump CISA in with the omnibus bill, we reduce any chance for debate over its surveillance-friendly provisions. We need to take a look at one issue at a time. We need to separate the CISA issue from the omnibus bill issue so that the outcome on each can be determined independently.
I definitely think that lumping CISA in with the omnibus bill only further reduces any possible chances of debate over its surveillance-friendly provisions. By lumping CISA in with the omnibus bill, that means that if the omnibus bill passes, CISA passes automatically without any further debate or discussion - and that's the problem.