Say nothing! They are preaching to you to bait you into a witch hunt. Trust me. I always kept my mouth shut, when I suggested they not speak so callous and extreme because it would actually not draw people to god but turn them away, I got drawn into a debate, the debate turned into accusations and now no one is speaking to me anymore. Just ignore them. I know its hard. Feel it out carefully at the least, if someone really wants to speak about rationality ok, but generally I would steer clear, they may already suspect and they are waiting to get to the bottom of it so they can get down to the punishment/shunning part to make you come back to god.jw.cult its a trap.
Just remember this scary fact about the witnesses and other high control religions and governments
Thinking critically or independently are the MOST offensive and WORST sins you can commit. It's sick but that is the reality.