Ist das Grammatisch richtig ?!

One visible effect of the Vietnam War on American society I found are the rallys of stdents.
This young population who met there at this time was a new culture was such a radical society.I think they are called the Hippies. All these people were young students and they protests together against the brutality and stupidity of the war in Vietnam they were for peace. One day, when four student demonstrators at Kent State University in Ohio were murdered by Ohio National Guarde during.
This is a visible effect wich contribute for that change on American society.

Danke!

I think they were called...

they protested together...

they were in favour of peace. "for" hat im Englischen nicht diesselbe Bedeutung wie im Deutschen.

during -> Da fehlt noch ein Wort. Während was wurden sie denn ermordet?

which contributes that change in American society

Ansonsten sieht die Grammatik schon besser aus als gestern

_________________
That was yesterday
But today life goes on
No more hiding in yesterday
Cause yesterday's gone

Echt, supi
Dankeschön fürs korrigieren !