After 9/11 there was no mass rioting against Muslims in US, and this is Great.
Regarding riots in Gujarat, Indian judiciary and people will decide whom to punish.
And US can decide on who come's in or not. But the policy should be even handed. US visa decesion on Modi's visa smacks of hypocrisy. Airport authorities in Arab countries are known to confisticate any religious symbols or idols from innocent passengers. Heads of their states can visit US. Most of the terrorists behind 9/11 and all the money behind is traced to Saudi Arabia. Their heads of states get a royal welcome. Paks R&D chief smuggles nuke secrets to Iran, North Korea, and Gadaffi. Pak govt for decades supported and funded the Talibization of Afghanistan. Pak continues to have govt-supported madrassas churning out hatred against all non-Muslims. Pak continues to be breeding and training ground of terrorists. President Mush of Pak is still welcome in White House.