> Active radar increases your detectability.

An active radar pointed at the ground, so you'd need a pretty extensive detection network. Also, I don't think stealth is much of a concern once the cruise missiles are over the target's territory. BTW, TERCOM doesn't need to be continuously radiating when in use, it only needs to get a fix frequently enough to keep INS within acceptable accuracy bounds.

> That isn't how radio signals work.

It is when you're talking about trying to interfere with a weapons grade radio, by transmitting to the sidelobe instead of mainlobe.