"......my brother asked him why he doesn't believe in the JW's and he said because there religion is based on a lie....."
That's the problem right there. As soon as a faithful Witness hears those words from an "inactive" Witness, then the blinders go on, the gates go up and they are deaf, dumb and blind from that moment on. That's "apostacy" in their opinion and they cut off communication for two reasons:
1. So that of course you'll be so devastated that you'll come back and "see the light", and
2. Because they've been warned time and time again over the years about listening to anyone who says ANYTHING against the Society, in other words: the Governing Body. They're told (as we all know) that "apostates" will try to "draw you away" with their "smooth lips" and "twisting" the scriptures, so naturally, your parents are unconsciously terrified that if they listen to you and your husband, that you'll be so convincing that they too will start to doubt whether this is "the Truth" and of course, then they'll fall in to Satan's snare and be drawn away and then they'll die at the Big A.
I'm glad your sister can see the light, but your parents are a different (but common) story. My advice to you, if you want to keep the lines of communication open with them is to try the following:
Write them a letter telling them how upset you are that they cut off communication. You might want to make it sound as though the reason you stopped going to the meetings is because you're upset at something an elder said to you, and wonder how this can be "the Truth", with an elder treating "a sheep" so badly. Your husband also feels "stumbled" and wondered the same thing, which is why he blurted out that he thought the religion was based on a lie.
Although this is trickery, it can work. For active JW parents, this is more along the lines of you being "stumbled" rather than you being an apostate, and from their point of view, you can still be saved. They could easily either call you or write to you and of course, blather on about the light getting brighter, not all elders are perfect etc...........you could pretend to really take it all in and of course confirm with her that deep down you "know" it's the Truth, but you just feel really hurt and stumbled right now.
Hopefully, your parents will be willing to "give you time" but will obviously be encouraging you to go back to the meetings. Eventually, they'll quit pestering you though, but as long as they just think you're "inactive", they'll be more likely to keep the lines of communication open.
Not everyone wants to do something like this, but it depends on how much keeping those lines of communication open with them means to you.
Let us know what happens. And God bless.