Gandalf, blood of hobbits on his hands?

[Inziladun]

Originally Posted by The Might

Yes.

The only "peaceful" end to the War of the Ring would have seen the West surrendering to Sauron at the start.
Likewise, diplomacy was not an option when dealing with the Ruffians. The Mayor of the Shire tried going to Bag End for a "peaceful" protest and got locked in prison for it.
Elderly Lobelia Sackville-Baggins attacked one of them with an umbrella and suffered the same fate.
If you're trying to say Gandalf could have organized some sort of passive resistance or diplomatic solution, my answer is that the Hobbits would have been just as capable of bringing that about, if it could be done at all. And it couldn't.