I went to Bangkok in January. I was very impressed with the welcome and acceptance I found in Buddhist wats and generally speaking. A monk in the street, smiled at me as I took off my sandals to show respect and he gave me a blessing.
I wanted to bring a Buddha figure back, but was advised that that could be considered disrespectful and that there were conventions regarding the placing of figures in houses (usually upstairs and isolated in an elevated space). My musing about an outdoor statue in the garden brought looks of horror - that would be horribly insulting it seems - and so I have no image.
I belong to a Christian church (CofE) and there is no such injunction. 'Graven images' of other gods are one thing, but Buddha was not a god and insisted that he should never be thought of as one.
I am at one with naomi on this - I would distance myself from this group, I don't like the sound of it. If you want to convert to Christianity we will most certainly welcome you, but go to see a vicar, or a recognised leader please. :)