I contend that it is absurd to think that one could rationally choose a particular religion.
I contend that it is absurd to think that, for example, one rationally chose to become a Christian, or a Hindu, or a Muslim, etc.
This (at least) for the following reason:
The idea that one can "choose a religion" implies, firstly:
A: that there is an objective, neutral and valid system of values and actions which one can apply in a situation when one is attempting to decide which particular religion (whether Christianity, Buddhism, Hinduism etc.) to follow,
B: that all religions are approving of this objective, neutral and valid system of values and actions and that this system does not conflict with any of the religions.
We know from experience that B is not the case, and A annulls the relevance of individual religions, as - secondly, the idea that one can "choose a religion" implies that said objective, neutral and valid system of values and actions is above any and all religions - more important, more relevant, "more true" than any religion.
Thus if one claims one chose one's religion by applying that presumably objective, neutral and valid system of values and actions, this means that one isn't really committed to said religion, but to one's presumably objective, neutral and valid system of values and actions.
Thus proselytizers of various religions who appeal to us to choose a religion, and more or less directly hint toward a presumably objective, neutral and valid system of values and actions which we should apply in order to make that choice
are suggesting that we do something that is in conflict with the religion they suggest that we choose. (!)