Yes, we'd be protested less if we'd contributed less. People have a right to protest, but regardless of how much Mormons contributed, it doesn't justify this...
-Envelopes containing white powder sent to LDS temples in California and Utah, and to site associated w/ Catholic church.
http://www.ksl.com/?nid=148&sid=4787495
-Vandalism of private property
http://www.youtube.com/watch?v=xzMI6YC5zQI
-Vandalism of churches
http://www.sacbee.com/101/story/1382472.html
-Book Of Mormon Set On Fire On Church Door Step
http://www.thedenverchannel.com/news/17964575/detail.html#-
And the fact remains, if Prop 8 had failed, Mormons would NOT have boycotted, protested, vandalized, etc. any of the groups that donated to "No on Prop 8."