To answer the o.p., I have two problems with what becomes mangling a religion, mine in particular. @Vinayaka already pointed one issue, namely when a non-Hindu tells a Hindu about Hinduism. Worse yet, getting it completely wrong. On one hand it can be humorous, on the other hand, it can be misleading when third party people believe it.
The other issue is something like one finds here Specific similarities between the lives of Jesus and Krishna. There are some similarities as I have maintained, but this is not only trying to fit a square peg into a round hole, it's using a 20 lb. sledge hammer to pound it in.
Basically, similarities are too easy to find. All you have to do is ignore the obvious differences, and see what's left.