first, you don't sell weapons if you're not close allies with that country(it's not your drug/arms dealer that'll give you weapons in exchange for money, it ain't that simple)
You don't ruin international connections with a country just cause of emotions, politics don't care about emotions. Everything is very strategic. What solid reason you have that India should cut ties with Israel? Palestine attacked Israel, they have all the right to eliminate their enemies, if your country is in a war, civilians will face difficulties, it's inevitable.
and if something wrong is happening there, then it's upto the higher authority to decide, like UN, NATO all other great powers of the world, it doesn't fall upon the shoulder of India to take action against it.
I ask you a simple question:
Did hamas attack Israel with missiles and killed it's civilians?
Yes or No
anything comes after you answer that