Is it normal to find indian guys unattractive?

It's completely normal to have preferences; everyone does and it's nearly impossible to choose what/who you are or aren't attracted to.
The problem I think people are seeing with this post is that you tried to justify your preferences (which don't need justifying in the first place) by stereotyping all Indian men as having the same personalities, like saying that all of them are perverted stalkers.

I have personally experienced what you're talking about in a few different immigrant groups myself, though. While I understand that it can seem annoying and degrading, I think it's cultural and not the men themselves trying to be that way.
For example, it seems like a lot of men from Mexico who've recently immigrated to the U.S. publicly sexually harass women more often than non-recent immigrants. I think it's because being open about their attraction (e.g. yelling sexual profanities or making lewd gestures) to women isn't seen as being as threatening or rude where they come from as it is in the U.S.
It's probably the same type of thing going on when Indian men interact with women who have entirely different cultural boundaries of what is and isn't socially acceptable behavior, whether in real life or on the internet.

The good thing is that they probably will eventually come to understand the social norms of the people they talk to. In the meantime, if someone is rude, tell them to shove it or just remove yourself from their internet grasp.
You don't have a choice as to who you're attracted to, but you can make an effort to understand why people who behave in a way you deem unacceptable act that way instead of lumping them all together and stereotyping them- that alone can make a big difference in how attractive you are to other people.