Well, there are belief systems and there are personal beliefs, it seems to me the only difference is how many people share it if you do not examine the exact contents.
I would invite everyone to examine their own beliefs regarding the belief systems of others. As far as the Judeo-Christian tradition is concerned, no doubt most of us are pretty familiar with it. But can you really make a fair judgement about another belief system without knowing very much about it? Because frankly if you don't, your opinion of the religion or any belief system (which frankly extends beyond religion) is also just that and only that, a belief. I might also point out that is the exact same behavior that we look down upon, the only difference is that its an individuals belief rather than one adopted by many.
Seeker makes a good point, particularly in the case of Taoism there is philosophical Taoism and religious Taoism, and this is perhaps the most distinct example. You don't have to actually practice the religion to know about it, it is very much an intellectual activity. It would only take a few minutes to learn the 4 noble truths of Buddhism, for example. To me it is simply something that should be done out of respect and a desire for being an educated individual.
BTW, you might be interested to know that as with Christianity and no doubt other religions, there are many sects of Buddhism, so a limited exposure is hardly representative of the religion as a whole. You have the pureland people who basically thinks repeating "praise Amitabha" will get you into paradise, but in contrast there are other schools that emphasize meditation and inquiry.
I'm just afraid that for a lot of ex-JW's their perception of other religions have in fact stayed pretty much the same as when they were a JW. That has nothing to do with whether you'd ever want to join a religion, but if that is the case it may be that one's thinking in general hasn't changed that much. Simply changing your position from "for" to "against" is really still two sides of the same coin.